hi nick again
i didn't want to 'steal' your idea, but i found this subject so interesting, that i tried to realize that approach in a pd-patch. the patch needs [abs~] from zexy and [lp8_butt~] from iemlib. the patch has 3 'stations' (three sources modulated on differently tuned carriers) and one 'receiver'. because of the very high sampling rate in the subpatch (1.53MHz, when pd runs with 44100Hz), the patch eats quite a lot of the cpu. surprisingly it sounds a bit like am-radio, though the quality of the received signal is very bad. the choice of the carrier frequencies does have big effect on the typical am-radio artefacts. there are sure some things, that could be improved. maybe you have use for it.
cheers roman
On Wed, 2006-12-13 at 12:45 +0000, nward04@qub.ac.uk wrote:
yep, Thats kinda the approach I was thinkin of. Off to read up on AM
radio a bit. thanks for the suggestionsOn 13 Dec 2006, at 11:43, Roman Haefeli wrote:
hi Nick
a possibly stupid, unrealistic and very untested idea comes to my
mind: why not build a real AM radio in pd? in a subpatch with a very high samplingrate (using [block~]-object) you could amplitude modulate the signal you want to transmit. with a narrow band-pass filter [bp~],
that is tuned to the carrier frequency, you could get back the amplitude of the original signal. maybe you add some [noise~] to simulate cosmic radiowaves. just a few ideas. i would be interested, if this approach has a chance to work....roman
On Wed, 2006-12-13 at 11:04 +0000, nward04@qub.ac.uk wrote:
Hi all, I was just wondering would anyone here have an idea on a starting point for a patch to simulate tuning in a station on an AM radio. I want to make a virtual radio with say 5 chanels that i can tune between replete with the hissing fizzing in between out of tune bits. Thanks Nick
Getting there now. Just what I was thinking of. Where to add in a
bit of noise is the next thing.
Thanks Roman
On 13 Dec 2006, at 15:02, Roman Haefeli wrote:
hi nick again
i didn't want to 'steal' your idea, but i found this subject so interesting, that i tried to realize that approach in a pd-patch. the patch needs [abs~] from zexy and [lp8_butt~] from iemlib. the
patch has 3 'stations' (three sources modulated on differently tuned
carriers) and one 'receiver'. because of the very high sampling rate in the subpatch (1.53MHz, when pd runs with 44100Hz), the patch eats quite a lot of the cpu. surprisingly it sounds a bit like am-radio, though the quality of the received signal is very bad. the choice of the carrier frequencies
does have big effect on the typical am-radio artefacts. there are sure some things, that could be improved. maybe you have use for it.cheers roman
On Wed, 2006-12-13 at 12:45 +0000, nward04@qub.ac.uk wrote:
yep, Thats kinda the approach I was thinkin of. Off to read up on AM radio a bit. thanks for the suggestions
On 13 Dec 2006, at 11:43, Roman Haefeli wrote:
hi Nick
a possibly stupid, unrealistic and very untested idea comes to my mind: why not build a real AM radio in pd? in a subpatch with a very high samplingrate (using [block~]-object) you could amplitude modulate
the signal you want to transmit. with a narrow band-pass filter [bp~], that is tuned to the carrier frequency, you could get back the
amplitude of the original signal. maybe you add some [noise~] to simulate cosmic radiowaves. just a few ideas. i would be interested, if this approach has a
chance to work....roman
On Wed, 2006-12-13 at 11:04 +0000, nward04@qub.ac.uk wrote:
Hi all, I was just wondering would anyone here have an idea on a starting point for a patch to simulate tuning in a station on an AM radio. I want to make a virtual radio with say 5 chanels that i can tune between replete with the hissing fizzing in between out of tune
bits. Thanks Nick<am-radio.pd> _______________________________________________ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/ listinfo/pd-list
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Roman Haefeli