🚀 go-pugleaf

Nicolas Alejandro Arauz (na0s+@andrew.cmu.edu) wrote:
: Maybe someone can answer this question for me:
: > this, so I'll ask you.  My question that I wasn't sure about was whether
: > or not ANY of these cards would all simultaneous input/output from the
: > ADC/DAC do do digital effects?  Or perhaps even switch so fast that you

I've had a go a doing a similar thing with my soundcard (for guitar effects,
etc). BTW, it's a SB pro version 1. I think it may be able to do
simultaneous ADC and DAC (not in DMA mode) but even if it does the audio
routing/mixing circuitry won't. For a start, you can't turn off the input
monitor without turning down everything else including the DAC, ie you
always get some of your original signal straight through (though I did think
about subtracting it). Also, selecting the DAC disconnects any sound from
the ADC (well, it gives random values - could be used as part of the ADC).

You can switch rapidly between ADC and DAC, but the result is pretty awful,
though it did work. After that I gave up, along with giving up on my
ultra-optimised 8 bit FIR fiter routines for the PC. I'll wait/pay for a
soundcard which is a bit less limited!

Antony. (deanaj@elec.canterbury.ac.nz)