Hi together,
I try to use the input of multiple microphones (four) in a squeak application. I already asked this question on the German list and got the reply that it won't work. Does anybody has an idea for a workaround? Squeak might not really be the best language for my project, but as soon as I have the sound signal, squeak is perfect for my needs.
I also thought about using opencroquet or open cobalt, to record four microphones on four different computers and to integrate the input in a common world.
Any ideas?
Thanks a lot Martin
Do they have be separate inputs? If not you could mix them externally. If they do have to be separate then a better idea of what you want to do would allow alternative suggestions.
On 2/7/09, Martin Bleichner bleichner.martin@gmail.com wrote:
Hi together,
I try to use the input of multiple microphones (four) in a squeak application. I already asked this question on the German list and got the reply that it won't work. Does anybody has an idea for a workaround? Squeak might not really be the best language for my project, but as soon as I have the sound signal, squeak is perfect for my needs.
I also thought about using opencroquet or open cobalt, to record four microphones on four different computers and to integrate the input in a common world.
Any ideas?
Thanks a lot Martin
Hi Derek,
they have to be separate. The idea is to control a cursor by sound. Every direction (left, right, up, down) is supposed to be controlled by a different sound source. Currently I am using one microphone and the SpectralAnalyzerMorph. The fft allows me to split up different frequencies. Consequently, by whisteling at specific frequencies one can control the cursor in different directions.
What I have in mind however are different sound sources having the same frequency content. The control of the cursor hence relies on amplitude.
One possibility would be to record four microphones, externally modulate the frequencies, combine the signals an pull them apart by the fft again.
I was hoping for something more out of the box :). But there apparently is no simple way to solve that problem
Best Martin
2009/2/7 Derek O'Connell doconnel@gmail.com
Do they have be separate inputs? If not you could mix them externally. If they do have to be separate then a better idea of what you want to do would allow alternative suggestions.
On 2/7/09, Martin Bleichner bleichner.martin@gmail.com wrote:
Hi together,
I try to use the input of multiple microphones (four) in a squeak application. I already asked this question on the German list and got the reply that
it
won't work. Does anybody has an idea for a workaround? Squeak might not really be the best language for my project, but as soon as I have the sound signal,
squeak
is perfect for my needs.
I also thought about using opencroquet or open cobalt, to record four microphones on four different computers and to integrate the input in a common world.
Any ideas?
Thanks a lot Martin
How about looking at the gsteamer support?
On 2/7/09, Martin Bleichner bleichner.martin@gmail.com wrote:
Hi Derek,
they have to be separate. The idea is to control a cursor by sound. Every direction (left, right, up, down) is supposed to be controlled by a different sound source. Currently I am using one microphone and the SpectralAnalyzerMorph. The fft allows me to split up different frequencies. Consequently, by whisteling at specific frequencies one can control the cursor in different directions.
What I have in mind however are different sound sources having the same frequency content. The control of the cursor hence relies on amplitude.
One possibility would be to record four microphones, externally modulate the frequencies, combine the signals an pull them apart by the fft again.
I was hoping for something more out of the box :). But there apparently is no simple way to solve that problem
Best Martin
2009/2/7 Derek O'Connell doconnel@gmail.com
Do they have be separate inputs? If not you could mix them externally. If they do have to be separate then a better idea of what you want to do would allow alternative suggestions.
On 2/7/09, Martin Bleichner bleichner.martin@gmail.com wrote:
Hi together,
I try to use the input of multiple microphones (four) in a squeak application. I already asked this question on the German list and got the reply that
it
won't work. Does anybody has an idea for a workaround? Squeak might not really be the best language for my project, but as soon as I have the sound signal,
squeak
is perfect for my needs.
I also thought about using opencroquet or open cobalt, to record four microphones on four different computers and to integrate the input in a common world.
Any ideas?
Thanks a lot Martin
Hello Martin,
MB> I try to use the input of multiple microphones (four) in a squeak application. MB> I already asked this question on the German list and got the reply that it won't work. MB> Does anybody has an idea for a workaround? Squeak might not MB> really be the best language for my project, but as soon as I have MB> the sound signal, squeak is perfect for my needs.
just curious, which language would you use to capture 4 channels? Squeak can do two channels as I wrote on the German list and I guess every other language also would have to link into some dll to get audio input from non standard pc sound hardware.
This could be done via FFI likewise. IMHO Squeak linux has an alsa plugin a driver which is supported by modern multichannel soundcards.
Cheers,
Herbert
Hi Herbert,
I don't know how the sound would be captured. I know that it is possible to record several microphones with specific hardware. But I don't know yet what happens from then on.
Best Martin
2009/2/7 Herbert König herbertkoenig@gmx.net
Hello Martin,
MB> I try to use the input of multiple microphones (four) in a squeak application. MB> I already asked this question on the German list and got the reply that it won't work. MB> Does anybody has an idea for a workaround? Squeak might not MB> really be the best language for my project, but as soon as I have MB> the sound signal, squeak is perfect for my needs.
just curious, which language would you use to capture 4 channels? Squeak can do two channels as I wrote on the German list and I guess every other language also would have to link into some dll to get audio input from non standard pc sound hardware.
This could be done via FFI likewise. IMHO Squeak linux has an alsa plugin a driver which is supported by modern multichannel soundcards.
Cheers,
Herbert
Martin Bleichner schrieb:
Hi together,
I try to use the input of multiple microphones (four) in a squeak application. I already asked this question on the German list and got the reply that it won't work. Does anybody has an idea for a workaround? Squeak might not really be the best language for my project, but as soon as I have the sound signal, squeak is perfect for my needs.
I have successfully used a combination of ExternalOSProcess and /usr/bin/arecord in a recording software which takes 24-bit 2-channel input at 44.1 kHz for live recording (and CD writing). That works very well and uses only moderate amounts of processing power. Using that approach, you should be able to access all ALSA input sources available on your machine. Alternatively, you could attach to the ALSA libraries using FFI - I just was too lazy for doing that, and my performance requirements were easily met by the arecord solution.
Cheers, Hans-Martin
squeak-dev@lists.squeakfoundation.org
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Derek O'Connell -
Hans-Martin Mosner -
Herbert König -
John McIntosh -
Martin Bleichner