Questions about 8chOUT/8xIN card

RASPIAUDIO
1

Hello !

I have a couple of newbie questions about the card with 8 channels.
I am interested mostly in the ADC part (= input), so my questions have to do with that funcionality.

  1. Can I record 8 channels@44.1 khz ? or are the 192 Khz named in the description some kind of bandwidth to be shared among all 8 channels ( 192 = 8 ch x 24 khz) ?

  2. If I want to transfer to a PC the 8 separate channels of audio, can the system (the raspberry PI 5 + this card) handle it in real time? I guess it’d be done via USB high speed 2.0…using UAC 2.0 to stream to a PC all 8 channels of data at a certain sampling freq. The raspberry PI would need a DMA/buffer solution to communicate with the card…and probably also a dma/buffer solution to handle USB high speed communication. Is such possible ?

  3. Let’s say I want to sample those 8 channels att 44.1 khz (or whatver the maximum is), then I want to process the audio signal…do some dsp stuff…such as adding effects and then send out via one channel of monoaural audio the results of the processing. Is that possible ? Does anyone know approximately how much processing power (in percentage) I would have left to do dsp after the processor has moved all the data in and out in real time ?

thanks

Ariel//

2

Hi
1-Yes 8 channels@44.1 khz will work, 192 Khz is per channel is the hardware capability but PI OS might add some limitation because of the kernel not sure

2- I dont understand your USB thing how you can convert I2S to USD device, instead i would go with a solution using the IP based to stream

3-Check Camilla DSP on raspberry pi