"below 4ms round-trip latency?"

I have not tested round trip. I've been using the (very clean) ADC to record into a buffer. That buffer is played back and modulated in real-time by a variety of sensors. Output has been less than 4ms latency (straight output through ALSA). I think with more tuning of the Pi, kernel, & Pd I could perhaps go lower, but it's not necessary for my current project.

"the audioinjector octo card is actually 6 in / 8 out"

my mistake!

On Sat, Sep 2, 2017 at 2:29 PM, Thomas Grill <gr@grrrr.org> wrote:
Hi,
the audioinjector octo card is actually 6 in / 8 out. It works nicely with new kernels (4.9+).
It should work with the rpi 0 since the GPIO pinout is identical to rpi 2/3.
Its width is like rpi 2/3, but it can still sit on the smaller rpi 0 board.
best, Thomas

--
Thomas Grill
http://grrrr.org



> Am 02.09.2017 um 20:15 schrieb Christof Ressi <christof.ressi@gmx.at>:
>
> wow, this sounds great! must try it out somehow.
>
>
> Gesendet: Samstag, 02. September 2017 um 20:10 Uhr
> Von: "Peter van Haaften" <petervh@gmail.com>
> An: "Christof Ressi" <christof.ressi@gmx.at>
> Cc: Pd-List <pd-list@lists.iem.at>
> Betreff: Re: [PD] pd on pi zero ?
>
> There is a GPIO pi zero soundcard to be released soon by an Australian company called Audio Injector:
>
> http://www.audioinjector.net/rpi-shop
>
> I have used their stereo card on my PI2 & 3 with great results. . . very low latency (below 4ms!).
>
> Also they have a 16 channel card (8in/8out) which is very tempting.
>
> Peter
>
> On Fri, Sep 1, 2017 at 2:37 PM, Christof Ressi <christof.ressi@gmx.at[mailto:christof.ressi@gmx.at]> wrote:I can also recommend this very cheap thing here (around 8€):
>
> http://www.manhattan-products.com/hi-speed-usb-3-d-sound-adapter[http://www.manhattan-products.com/hi-speed-usb-3-d-sound-adapter]
> https://www.neuhold-elektronik.at/catshop/product_info.php?products_id=4925
>
> (I think both are more or less the same).
>
> the latency is quite bad but basically the same as the Behringer UCA202. I used it several interactive installations with the Raspberry Pi 3 where I didn't need ultra low latencies and it worked well.
>
> Christof
>
>
>
>
>
>
>
>
> Gesendet: Freitag, 01. September 2017 um 19:38 Uhr
> Von: "Daniel Iglesia" <daniel.iglesia@gmail.com[mailto:daniel.iglesia@gmail.com]>
> An: "Theron Trowbridge" <theron.trowbridge@gmail.com[mailto:theron.trowbridge@gmail.com]>
> Cc: "pd-list@lists.iem.at[mailto:pd-list@lists.iem.at]" <pd-list@lists.iem.at[mailto:pd-list@lists.iem.at]>, "Thomas Grill" <gr@grrrr.org[mailto:gr@grrrr.org]>
> Betreff: Re: [PD] pd on pi zero ?
>
> I got smooth audio stereo output (didn't test input) with a Behringer U-Control UCA202 and a pi-zero.
> I just tried a simple sine wave, I didn't push it to see what happens under load...but now I'm curious to revisit it and see...
>
> On Fri, Sep 1, 2017 at 10:16 AM, Theron Trowbridge <theron.trowbridge@gmail.com[mailto:theron.trowbridge@gmail.com][mailto:theron.trowbridge@gmail.com[mailto:theron.trowbridge@gmail.com]]> wrote:
> I would think Pd should work on a zero, though I haven't tried it myself.
>
> Miller has some sound card recommendations on the Pd documentation http://msp.ucsd.edu/Pd_documentation/x3.htm#s1.0[http://msp.ucsd.edu/Pd_documentation/x3.htm#s1.0][http://msp.ucsd.edu/Pd_documentation/x3.htm#s1.0[http://msp.ucsd.edu/Pd_documentation/x3.htm#s1.0]] in the section "Audio hardware in Linux".
>
> I have had good luck with the Griffin Technology iMic with the non-zero Raspberry Pi models - amazon.com/gp/product/B003Y5D776[http://amazon.com/gp/product/B003Y5D776][http://amazon.com/gp/product/B003Y5D776[http://amazon.com/gp/product/B003Y5D776]], and I think it's based on one of the chipsets that Miller found worked well.
>
>
> -Theron
> ^
>
>
>
> On Fri, Sep 1, 2017 at 3:51 AM, Thomas Grill <gr@grrrr.org[mailto:gr@grrrr.org][mailto:gr@grrrr.org[mailto:gr@grrrr.org]]> wrote:Hi Jaime,
> i have successfully used the PhatDAC and other I2S based dacs. Output-only though!
> Will report later on trying the audioinjector octo card which is input/output.
> best, Thomas
>
>> Am 31.08.2017 um 04:37 schrieb Jaime Oliver <jaime.oliver2@gmail.com[mailto:jaime.oliver2@gmail.com][mailto:jaime.oliver2@gmail.com[mailto:jaime.oliver2@gmail.com]]>:
>>
>> Hello everyone!
>>
>> Has anyone tried to use pd on a pi zero and if so, which audio interface did you use?
>>
>> J> _______________________________________________
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