The onbopard audio might be better, but from what I could tell by the press release, it does't add a dedicated USB controller. In that case, it will probably still have the same issues with USB audio devices.
Anybody played with the new Raspberry Pi model? It claims to haveimproved
audio; I'm curious how that would effect a running instance of Pd on the Pi.
Best, Jonathan
On Tue, Jul 15, 2014 at 6:00 AM, via Pd-list pd-list@lists.iem.at wrote:
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Today's Topics:
- Raspberry Pi B+ (Jonathan Wilkes via Pd-list)
---------- Forwarded message ---------- From: Jonathan Wilkes via Pd-list pd-list@lists.iem.at To: pd list pd-list@iem.at Cc: Date: Mon, 14 Jul 2014 09:55:15 -0700 Subject: [PD] Raspberry Pi B+ Hi List, Anybody played with the new Raspberry Pi model? It claims to have improved audio; I'm curious how that would effect a running instance of Pd on the Pi.
Best, Jonathan
Pd-list mailing list Pd-list@lists.iem.at to manage your subscription (including un-subscription) see http://lists.puredata.info/listinfo/pd-list
I can't say much without playing with one, but I get the impression from comments that the USB ports at least aren't as finicky about power. Right now I just use a Powered USB hub to power my Pi Model B, Behringer UCG102, and a QuNeo controller. Maybe the B+ could work without the hub?
Those extra GPIO pins could definitely come in handy, too - if you are connecting some buttons or pots, you shouldn't need to add an Arduino.
I'm still curious about the real-world performance of the Pi relative to the UDOO, Cubie, or similar boards - I've got decent performance with my Pi at about 10ms latency with a couple of effects running. If I push it too much, sure, I get xruns, but it's not like I can get insanely better performance with my laptop (which has an i5).
-Brian
On Tue, Jul 15, 2014 at 10:15 AM, Dan Wilcox via Pd-list < pd-list@lists.iem.at> wrote:
The onbopard audio might be better, but from what I could tell by the press release, it does't add a dedicated USB controller. In that case, it will probably still have the same issues with USB audio devices.
Anybody played with the new Raspberry Pi model? It claims to
haveimproved audio; I'm curious how that would effect a running instance of Pd on the Pi.
Best, Jonathan
On Tue, Jul 15, 2014 at 6:00 AM, via Pd-list pd-list@lists.iem.at wrote:
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Today's Topics:
- Raspberry Pi B+ (Jonathan Wilkes via Pd-list)
---------- Forwarded message ---------- From: Jonathan Wilkes via Pd-list pd-list@lists.iem.at To: pd list pd-list@iem.at Cc: Date: Mon, 14 Jul 2014 09:55:15 -0700 Subject: [PD] Raspberry Pi B+ Hi List, Anybody played with the new Raspberry Pi model? It claims to have improved audio; I'm curious how that would effect a running instance of Pd on the Pi.
Best, Jonathan
Pd-list mailing list Pd-list@lists.iem.at to manage your subscription (including un-subscription) see http://lists.puredata.info/listinfo/pd-list
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But I wonder if the onboard audio is now decent enough to do basic work with Pd.
-Jonathan
On Tuesday, July 15, 2014 11:31 AM, Brian Fay via Pd-list pd-list@lists.iem.at wrote:
I can't say much without playing with one, but I get the impression from comments that the USB ports at least aren't as finicky about power. Right now I just use a Powered USB hub to power my Pi Model B, Behringer UCG102, and a QuNeo controller. Maybe the B+ could work without the hub?
Those extra GPIO pins could definitely come in handy, too - if you are connecting some buttons or pots, you shouldn't need to add an Arduino.
I'm still curious about the real-world performance of the Pi relative to the UDOO, Cubie, or similar boards - I've got decent performance with my Pi at about 10ms latency with a couple of effects running. If I push it too much, sure, I get xruns, but it's not like I can get insanely better performance with my laptop (which has an i5).
-Brian
On Tue, Jul 15, 2014 at 10:15 AM, Dan Wilcox via Pd-list pd-list@lists.iem.at wrote:
The onbopard audio might be better, but from what I could tell by the press release, it does't add a dedicated USB controller. In that case, it will probably still have the same issues with USB audio devices.
Anybody played with the new Raspberry Pi model? It claims to haveimproved audio; I'm curious how that would effect a running instance of Pd on the Pi.
Best, Jonathan
On Tue, Jul 15, 2014 at 6:00 AM, via Pd-list pd-list@lists.iem.at wrote:
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Today's Topics:
1. Raspberry Pi B+ (Jonathan Wilkes via Pd-list)
---------- Forwarded message ---------- From: Jonathan Wilkes via Pd-list pd-list@lists.iem.at To: pd list pd-list@iem.at Cc: Date: Mon, 14 Jul 2014 09:55:15 -0700 Subject: [PD] Raspberry Pi B+
Hi List, Anybody played with the new Raspberry Pi model? It claims to have improved audio; I'm curious how that would effect a running instance of Pd on the Pi.
Best, Jonathan _______________________________________________ Pd-list mailing list Pd-list@lists.iem.at to manage your subscription (including un-subscription) see http://lists.puredata.info/listinfo/pd-list
-- Dan Wilcox danomatika.com robotcowboy.com _______________________________________________ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
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Depends what you mean by decent enough. Original Pi has audio out. Is it decent enough, depends on your needs. That said, RPi (regardless of the revision) is a formidable arduino replacement. See lots of pots shield that fits either (I just presented a paper on it in NIME) made by modern device. Couple that with an $9 USB audio card that has both input and output and you're done.
HTH On Jul 15, 2014 12:43 PM, "Jonathan Wilkes via Pd-list" pd-list@mail.iem.at wrote:
But I wonder if the onboard audio is now decent enough to do basic work with Pd.
-Jonathan
On Tuesday, July 15, 2014 11:31 AM, Brian Fay via Pd-list < pd-list@lists.iem.at> wrote:
I can't say much without playing with one, but I get the impression from comments that the USB ports at least aren't as finicky about power. Right now I just use a Powered USB hub to power my Pi Model B, Behringer UCG102, and a QuNeo controller. Maybe the B+ could work without the hub?
Those extra GPIO pins could definitely come in handy, too - if you are connecting some buttons or pots, you shouldn't need to add an Arduino.
I'm still curious about the real-world performance of the Pi relative to the UDOO, Cubie, or similar boards - I've got decent performance with my Pi at about 10ms latency with a couple of effects running. If I push it too much, sure, I get xruns, but it's not like I can get insanely better performance with my laptop (which has an i5).
-Brian
On Tue, Jul 15, 2014 at 10:15 AM, Dan Wilcox via Pd-list < pd-list@lists.iem.at> wrote:
The onbopard audio might be better, but from what I could tell by the press release, it does't add a dedicated USB controller. In that case, it will probably still have the same issues with USB audio devices.
Anybody played with the new Raspberry Pi model? It claims to
haveimproved audio; I'm curious how that would effect a running instance of Pd on the Pi.
Best, Jonathan
On Tue, Jul 15, 2014 at 6:00 AM, via Pd-list pd-list@lists.iem.at wrote:
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Today's Topics:
- Raspberry Pi B+ (Jonathan Wilkes via Pd-list)
---------- Forwarded message ---------- From: Jonathan Wilkes via Pd-list pd-list@lists.iem.at To: pd list pd-list@iem.at Cc: Date: Mon, 14 Jul 2014 09:55:15 -0700 Subject: [PD] Raspberry Pi B+ Hi List, Anybody played with the new Raspberry Pi model? It claims to have improved audio; I'm curious how that would effect a running instance of Pd on the Pi.
Best, Jonathan
Pd-list mailing list Pd-list@lists.iem.at to manage your subscription (including un-subscription) see http://lists.puredata.info/listinfo/pd-list
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Couple that with an $9 USB audio card that has both input and output and
you're done.
... well, I dunno about that part. :D Some of us want phantom power & XLR/1/4 in. The RPI doesn't play nicely with any of the cards I have ...
On Tue, Jul 15, 2014 at 12:52 PM, Ivica Bukvic ico@vt.edu wrote:
Depends what you mean by decent enough. Original Pi has audio out. Is it decent enough, depends on your needs. That said, RPi (regardless of the revision) is a formidable arduino replacement. See lots of pots shield that fits either (I just presented a paper on it in NIME) made by modern device. Couple that with an $9 USB audio card that has both input and output and you're done.
HTH On Jul 15, 2014 12:43 PM, "Jonathan Wilkes via Pd-list" < pd-list@mail.iem.at> wrote:
But I wonder if the onboard audio is now decent enough to do basic work with Pd.
-Jonathan
On Tuesday, July 15, 2014 11:31 AM, Brian Fay via Pd-list < pd-list@lists.iem.at> wrote:
I can't say much without playing with one, but I get the impression from comments that the USB ports at least aren't as finicky about power. Right now I just use a Powered USB hub to power my Pi Model B, Behringer UCG102, and a QuNeo controller. Maybe the B+ could work without the hub?
Those extra GPIO pins could definitely come in handy, too - if you are connecting some buttons or pots, you shouldn't need to add an Arduino.
I'm still curious about the real-world performance of the Pi relative to the UDOO, Cubie, or similar boards - I've got decent performance with my Pi at about 10ms latency with a couple of effects running. If I push it too much, sure, I get xruns, but it's not like I can get insanely better performance with my laptop (which has an i5).
-Brian
On Tue, Jul 15, 2014 at 10:15 AM, Dan Wilcox via Pd-list < pd-list@lists.iem.at> wrote:
The onbopard audio might be better, but from what I could tell by the press release, it does't add a dedicated USB controller. In that case, it will probably still have the same issues with USB audio devices.
Anybody played with the new Raspberry Pi model? It claims to
haveimproved audio; I'm curious how that would effect a running instance of Pd on the Pi.
Best, Jonathan
On Tue, Jul 15, 2014 at 6:00 AM, via Pd-list pd-list@lists.iem.at wrote:
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Today's Topics:
- Raspberry Pi B+ (Jonathan Wilkes via Pd-list)
---------- Forwarded message ---------- From: Jonathan Wilkes via Pd-list pd-list@lists.iem.at To: pd list pd-list@iem.at Cc: Date: Mon, 14 Jul 2014 09:55:15 -0700 Subject: [PD] Raspberry Pi B+ Hi List, Anybody played with the new Raspberry Pi model? It claims to have improved audio; I'm curious how that would effect a running instance of Pd on the Pi.
Best, Jonathan
Pd-list mailing list Pd-list@lists.iem.at to manage your subscription (including un-subscription) see http://lists.puredata.info/listinfo/pd-list
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You're right-- $9 soundcard won't give you that. But for a desktop mic or one that Katja makes, this will be more than sufficient. On Jul 15, 2014 12:55 PM, "Dan Wilcox" danomatika@gmail.com wrote:
Couple that with an $9 USB audio card that has both input and output and
you're done.
... well, I dunno about that part. :D Some of us want phantom power & XLR/1/4 in. The RPI doesn't play nicely with any of the cards I have ...
On Tue, Jul 15, 2014 at 12:52 PM, Ivica Bukvic ico@vt.edu wrote:
Depends what you mean by decent enough. Original Pi has audio out. Is it decent enough, depends on your needs. That said, RPi (regardless of the revision) is a formidable arduino replacement. See lots of pots shield that fits either (I just presented a paper on it in NIME) made by modern device. Couple that with an $9 USB audio card that has both input and output and you're done.
HTH On Jul 15, 2014 12:43 PM, "Jonathan Wilkes via Pd-list" < pd-list@mail.iem.at> wrote:
But I wonder if the onboard audio is now decent enough to do basic work with Pd.
-Jonathan
On Tuesday, July 15, 2014 11:31 AM, Brian Fay via Pd-list < pd-list@lists.iem.at> wrote:
I can't say much without playing with one, but I get the impression from comments that the USB ports at least aren't as finicky about power. Right now I just use a Powered USB hub to power my Pi Model B, Behringer UCG102, and a QuNeo controller. Maybe the B+ could work without the hub?
Those extra GPIO pins could definitely come in handy, too - if you are connecting some buttons or pots, you shouldn't need to add an Arduino.
I'm still curious about the real-world performance of the Pi relative to the UDOO, Cubie, or similar boards - I've got decent performance with my Pi at about 10ms latency with a couple of effects running. If I push it too much, sure, I get xruns, but it's not like I can get insanely better performance with my laptop (which has an i5).
-Brian
On Tue, Jul 15, 2014 at 10:15 AM, Dan Wilcox via Pd-list < pd-list@lists.iem.at> wrote:
The onbopard audio might be better, but from what I could tell by the press release, it does't add a dedicated USB controller. In that case, it will probably still have the same issues with USB audio devices.
Anybody played with the new Raspberry Pi model? It claims to
haveimproved audio; I'm curious how that would effect a running instance of Pd on the Pi.
Best, Jonathan
On Tue, Jul 15, 2014 at 6:00 AM, via Pd-list pd-list@lists.iem.at wrote:
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Today's Topics:
- Raspberry Pi B+ (Jonathan Wilkes via Pd-list)
---------- Forwarded message ---------- From: Jonathan Wilkes via Pd-list pd-list@lists.iem.at To: pd list pd-list@iem.at Cc: Date: Mon, 14 Jul 2014 09:55:15 -0700 Subject: [PD] Raspberry Pi B+ Hi List, Anybody played with the new Raspberry Pi model? It claims to have improved audio; I'm curious how that would effect a running instance of Pd on the Pi.
Best, Jonathan
Pd-list mailing list Pd-list@lists.iem.at to manage your subscription (including un-subscription) see http://lists.puredata.info/listinfo/pd-list
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On 07/15/2014 01:34 PM, Ivica Bukvic wrote:
You're right-- $9 soundcard won't give you that. But for a desktop mic or one that Katja makes, this will be more than sufficient.
So the onboard audio doesn't do input?
-Jonathan
On Jul 15, 2014 12:55 PM, "Dan Wilcox" <danomatika@gmail.com mailto:danomatika@gmail.com> wrote:
>Couple that with an $9 USB audio card that has both input and output and you're done. ... well, I dunno about that part. :D Some of us want phantom power & XLR/1/4 in. The RPI doesn't play nicely with any of the cards I have ... On Tue, Jul 15, 2014 at 12:52 PM, Ivica Bukvic <ico@vt.edu <mailto:ico@vt.edu>> wrote: Depends what you mean by decent enough. Original Pi has audio out. Is it decent enough, depends on your needs. That said, RPi (regardless of the revision) is a formidable arduino replacement. See lots of pots shield that fits either (I just presented a paper on it in NIME) made by modern device. Couple that with an $9 USB audio card that has both input and output and you're done. HTH On Jul 15, 2014 12:43 PM, "Jonathan Wilkes via Pd-list" <pd-list@mail.iem.at <mailto:pd-list@mail.iem.at>> wrote: But I wonder if the onboard audio is now decent enough to do basic work with Pd. -Jonathan On Tuesday, July 15, 2014 11:31 AM, Brian Fay via Pd-list <pd-list@lists.iem.at <mailto:pd-list@lists.iem.at>> wrote: I can't say much without playing with one, but I get the impression from comments that the USB ports at least aren't as finicky about power. Right now I just use a Powered USB hub to power my Pi Model B, Behringer UCG102, and a QuNeo controller. Maybe the B+ could work without the hub? Those extra GPIO pins could definitely come in handy, too - if you are connecting some buttons or pots, you shouldn't need to add an Arduino. I'm still curious about the real-world performance of the Pi relative to the UDOO, Cubie, or similar boards - I've got decent performance with my Pi at about 10ms latency with a couple of effects running. If I push it too much, sure, I get xruns, but it's not like I can get insanely better performance with my laptop (which has an i5). -Brian On Tue, Jul 15, 2014 at 10:15 AM, Dan Wilcox via Pd-list <pd-list@lists.iem.at <mailto:pd-list@lists.iem.at>> wrote: The onbopard audio might be better, but from what I could tell by the press release, it does't add a dedicated USB controller. In that case, it will probably still have the same issues with USB audio devices. >Anybody played with the new Raspberry Pi model? It claims to haveimproved audio; I'm curious how that would effect a running instance of Pd on the Pi. > >Best, >Jonathan On Tue, Jul 15, 2014 at 6:00 AM, via Pd-list <pd-list@lists.iem.at <mailto:pd-list@lists.iem.at>> wrote: Send Pd-list mailing list submissions to pd-list@lists.iem.at <mailto:pd-list@lists.iem.at> To subscribe or unsubscribe via the World Wide Web, visit http://lists.puredata.info/listinfo/pd-list or, via email, send a message with subject or body 'help' to pd-list-request@lists.iem.at <mailto:pd-list-request@lists.iem.at> You can reach the person managing the list at pd-list-owner@lists.iem.at <mailto:pd-list-owner@lists.iem.at> When replying, please edit your Subject line so it is more specific than "Re: Contents of Pd-list digest..." Today's Topics: 1. Raspberry Pi B+ (Jonathan Wilkes via Pd-list) ---------- Forwarded message ---------- From: Jonathan Wilkes via Pd-list <pd-list@lists.iem.at <mailto:pd-list@lists.iem.at>> To: pd list <pd-list@iem.at <mailto:pd-list@iem.at>> Cc: Date: Mon, 14 Jul 2014 09:55:15 -0700 Subject: [PD] Raspberry Pi B+ Hi List, Anybody played with the new Raspberry Pi model? It claims to have improved audio; I'm curious how that would effect a running instance of Pd on the Pi. Best, Jonathan _______________________________________________ Pd-list mailing list Pd-list@lists.iem.at <mailto:Pd-list@lists.iem.at> to manage your subscription (including un-subscription) see http://lists.puredata.info/listinfo/pd-list -- Dan Wilcox danomatika.com <http://danomatika.com/> robotcowboy.com <http://robotcowboy.com/> _______________________________________________ Pd-list@lists.iem.at <mailto:Pd-list@lists.iem.at> mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list _______________________________________________ Pd-list@lists.iem.at <mailto:Pd-list@lists.iem.at> mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list _______________________________________________ Pd-list@lists.iem.at <mailto:Pd-list@lists.iem.at> mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list -- Dan Wilcox danomatika.com <http://danomatika.com> robotcowboy.com <http://robotcowboy.com>
No. The rPI is audio out only, as noted in a recent list discussion where pd balks when you try to start it using the onboard audio without -noadc.
On Tue, Jul 15, 2014 at 2:31 PM, Jonathan Wilkes jancsika@yahoo.com wrote:
On 07/15/2014 01:34 PM, Ivica Bukvic wrote:
You're right-- $9 soundcard won't give you that. But for a desktop mic or one that Katja makes, this will be more than sufficient.
So the onboard audio doesn't do input?
-Jonathan
On Jul 15, 2014 12:55 PM, "Dan Wilcox" danomatika@gmail.com wrote:
Couple that with an $9 USB audio card that has both input and output
and you're done.
... well, I dunno about that part. :D Some of us want phantom power & XLR/1/4 in. The RPI doesn't play nicely with any of the cards I have ...
On Tue, Jul 15, 2014 at 12:52 PM, Ivica Bukvic ico@vt.edu wrote:
Depends what you mean by decent enough. Original Pi has audio out. Is it decent enough, depends on your needs. That said, RPi (regardless of the revision) is a formidable arduino replacement. See lots of pots shield that fits either (I just presented a paper on it in NIME) made by modern device. Couple that with an $9 USB audio card that has both input and output and you're done.
HTH On Jul 15, 2014 12:43 PM, "Jonathan Wilkes via Pd-list" < pd-list@mail.iem.at> wrote:
But I wonder if the onboard audio is now decent enough to do basic work with Pd.
-Jonathan
On Tuesday, July 15, 2014 11:31 AM, Brian Fay via Pd-list < pd-list@lists.iem.at> wrote:
I can't say much without playing with one, but I get the impression from comments that the USB ports at least aren't as finicky about power. Right now I just use a Powered USB hub to power my Pi Model B, Behringer UCG102, and a QuNeo controller. Maybe the B+ could work without the hub?
Those extra GPIO pins could definitely come in handy, too - if you are connecting some buttons or pots, you shouldn't need to add an Arduino.
I'm still curious about the real-world performance of the Pi relative to the UDOO, Cubie, or similar boards - I've got decent performance with my Pi at about 10ms latency with a couple of effects running. If I push it too much, sure, I get xruns, but it's not like I can get insanely better performance with my laptop (which has an i5).
-Brian
On Tue, Jul 15, 2014 at 10:15 AM, Dan Wilcox via Pd-list < pd-list@lists.iem.at> wrote:
The onbopard audio might be better, but from what I could tell by the press release, it does't add a dedicated USB controller. In that case, it will probably still have the same issues with USB audio devices.
Anybody played with the new Raspberry Pi model? It claims to
haveimproved audio; I'm curious how that would effect a running instance of Pd on the Pi.
Best, Jonathan
On Tue, Jul 15, 2014 at 6:00 AM, via Pd-list pd-list@lists.iem.at wrote:
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Today's Topics:
- Raspberry Pi B+ (Jonathan Wilkes via Pd-list)
---------- Forwarded message ---------- From: Jonathan Wilkes via Pd-list pd-list@lists.iem.at To: pd list pd-list@iem.at Cc: Date: Mon, 14 Jul 2014 09:55:15 -0700 Subject: [PD] Raspberry Pi B+ Hi List, Anybody played with the new Raspberry Pi model? It claims to have improved audio; I'm curious how that would effect a running instance of Pd on the Pi.
Best, Jonathan
Pd-list mailing list Pd-list@lists.iem.at to manage your subscription (including un-subscription) see http://lists.puredata.info/listinfo/pd-list
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Hi all,
I am experimenting with the rpi B and the wolfson audio card. I want
to also design a very basic preamp for this card (connect a dynamic
mic & a instrument to line-in). I can get as low as -audiobuf 3 with
[adc~] - [dac~], of course as the patch gets more complex, I have to
adjust the -audiobuf... so far I am happy with it, but many people are
complaining that there's no support for it (you need to compile the
module - not part of raspbian).
Will post all the information, code and schematic for the preamp +-
the end of the summer (so much to do, so little time). Feel free to
poke me for more information.
à+
On 16/07/14 02:52, Ivica Bukvic via Pd-list wrote:
Depends what you mean by decent enough. Original Pi has audio out. Is it decent enough, depends on your needs. That said, RPi (regardless of the revision) is a formidable arduino replacement. See lots of pots shield that fits either (I just presented a paper on it in NIME) made by modern device. Couple that with an $9 USB audio card that has both input and output and you're done.
or lash out on a $35 wolfson card if you need stereo in and out plus more, and want to avoid the usb.
certainly the Raspberries are cheaper than the Udoo, even with this card included ... but 3+ x the price of a Raspberry does get you a lot more computing power (4 much faster CPU cores plus an Arduino Due core with all the analogue and digital IO exposed and internally connected ... and the GPUs have openCL available and much more comprehensive documentation if you want to use them at a very raw level). There are much better peripherals included if you need that. Not sure yet how the audio noise compares between the wolfson, plain raspberry and udoo but will test and report eventually
Simon.
On 16/07/14 00:15, Dan Wilcox via Pd-list wrote:
The onbopard audio might be better, but from what I could tell by the press release, it does't add a dedicated USB controller. In that case, it will probably still have the same issues with USB audio devices.
Anybody played with the new Raspberry Pi model? It claims to haveimproved
audio; I'm curious how that would effect a running instance of Pd on the Pi.
Haven't got mine delivered yet (it is on the way) but looking at the (minimal) schematics provided so far they have improved the power .. the miniUSB has gone up from 1.1 amps to 2 amps with a regulator added. Also the whole is said to draw significantly less power (why???) .. so other things have changed also. The USB/Ethernet hub has been changed to the 4-out version of the same chip, maybe this version is also better in other ways? I don't know if this hub is the problem for usb, or if the problem is the usb out of the main chip ... if the model A (without this hub) does better with usb audio cards than model B then the problem is here, but I have not got a model A to test with.
The board layout is completely new, so it might also be cleaner for audio? I will test noise and latency when it gets here.
I have just received 2 wolfson audio cards, which use the digital PCM link (rather than usb) and also expose another PCM link on a header plus a clock input (to the Pi header). They are quite flexible as far as clocking goes so several Pis could run these and share a single clock source (and pass digital audio between them), so I'll be testing that. It mounts onto the B-rev2 using the digital PCM on the 8 holes near the main 26 pin breakout. The B+ adds more GPIOs to a 40 pin breakout instead which include this stereo PCM link (and several others ... the clock, PWM and most of the digital interfaces can now be used simultaneously) but the digital audio is on different GPIOs so there will need to be some patching and some leads made up to use it on the B+. Unfortunately the wolfson card does not bring out the balanced audio pins from the chip (it has multiple DAC/ADCs) but instead it connects built in stereo mics, 2W amplified outputs and such.
The B rev2 schematics with the old power in and showing the low pass filter circuit on the PWM outputs providing the analogue audio:
http://www.raspberrypi.org/wp-content/uploads/2012/10/Raspberry-Pi-R2.0-Sche...
or
http://www.raspberrypi.org/documentation/hardware/raspberrypi/Raspberry-Pi-R...
power is top of page 1, audio is lower right of page 2.
the new schematics with new power etc, with no mention of changes to the audio filter circuit (just the changes to the audio jack):
http://www.raspberrypi.org/documentation/hardware/raspberrypi/Raspberry-Pi-B...
here is a photo with the new layout and new USB chip:
http://www.raspberrypi.org/wp-content/uploads/2014/07/rsz_b-.jpg
Simon
On 07/16/2014 11:36 PM, Simon Wise via Pd-list wrote:
On 16/07/14 00:15, Dan Wilcox via Pd-list wrote:
The onbopard audio might be better, but from what I could tell by the press release, it does't add a dedicated USB controller. In that case, it will probably still have the same issues with USB audio devices.
Anybody played with the new Raspberry Pi model? It claims to haveimproved
audio; I'm curious how that would effect a running instance of Pd on the Pi.
Haven't got mine delivered yet (it is on the way) but looking at the (minimal) schematics provided so far they have improved the power .. the miniUSB has gone up from 1.1 amps to 2 amps with a regulator added. Also the whole is said to draw significantly less power (why???) .. so other things have changed also. The USB/Ethernet hub has been changed to the 4-out version of the same chip, maybe this version is also better in other ways? I don't know if this hub is the problem for usb, or if the problem is the usb out of the main chip ... if the model A (without this hub) does better with usb audio cards than model B then the problem is here, but I have not got a model A to test with.
The board layout is completely new, so it might also be cleaner for audio? I will test noise and latency when it gets here.
I ordered one the other day, so I'll definitely test it, too. (I've never played with an RPI before, so I'll probably doing some general playing around before getting to Pd specifically.)
I have just received 2 wolfson audio cards, which use the digital PCM link (rather than usb) and also expose another PCM link on a header plus a clock input (to the Pi header). They are quite flexible as far as clocking goes so several Pis could run these and share a single clock source (and pass digital audio between them), so I'll be testing that. It mounts onto the B-rev2 using the digital PCM on the 8 holes near the main 26 pin breakout. The B+ adds more GPIOs to a 40 pin breakout instead which include this stereo PCM link (and several others ... the clock, PWM and most of the digital interfaces can now be used simultaneously) but the digital audio is on different GPIOs so there will need to be some patching and some leads made up to use it on the B+. Unfortunately the wolfson card does not bring out the balanced audio pins from the chip (it has multiple DAC/ADCs) but instead it connects built in stereo mics, 2W amplified outputs and such.
The B rev2 schematics with the old power in and showing the low pass filter circuit on the PWM outputs providing the analogue audio:
http://www.raspberrypi.org/wp-content/uploads/2012/10/Raspberry-Pi-R2.0-Sche...
or
http://www.raspberrypi.org/documentation/hardware/raspberrypi/Raspberry-Pi-R...
power is top of page 1, audio is lower right of page 2.
the new schematics with new power etc, with no mention of changes to the audio filter circuit (just the changes to the audio jack):
http://www.raspberrypi.org/documentation/hardware/raspberrypi/Raspberry-Pi-B...
here is a photo with the new layout and new USB chip:
http://www.raspberrypi.org/wp-content/uploads/2014/07/rsz_b-.jpg
This is all very exciting!
-Jonathan
Simon
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On 17/07/14 14:33, Jonathan Wilkes via Pd-list wrote:
I ordered one the other day, so I'll definitely test it, too. (I've never played with an RPI before, so I'll probably doing some general playing around before getting to Pd specifically.)
They are good value and compact, but rather limited compared to units that cost a bit more. I've done a few projects, they are probably most useful for video playback and working with GPIO input, the wolfson card may make them good for stereo audio also ... but the access to the GPU is fairly closed and I've struggled to get them to do what I want, kind of got there ... certainly playing a single HD video with sound through hdmi is good, 3D mapping is possible, also alpha overlays ... but it is still very much custom per project at the moment for me. Playing HD is very much at the limit of what they can do and requires a lot of tweaking and compromises depending on what is wanted each time. They can do more at lower resolutions. Documentation beyond the sample code is limited. The GPIO stuff has some nice libraries and works well.
Sometime later this year I'll have something more generalised and usable that I can share, but for now it really is too messy.
Simon
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