Michele Spinolo wrote : > Hi guys, > > I'm going to buy one of these cards, and I was wondering what about the > differences from one to each other and concernig ALSA's support. > By ALSA's website seems they are completly supported, but I would like to > have some users' confimations. > > On RME website I focused this words: > > HDSP 9652 is the long-awaited successor of the well-known PCI card Project > Hammerfall (DIGI9652). Like the original Hammerfall, HDSP 9652 offers 3 x > ADAT optical I/O, ADAT-Sync In, SPDIF I/O and word clock I/O. On top, there > are 2 MIDI I/Os and TotalMix, a DSP-based real-time mixer/router. > > apart from MIDI I/Os which I do not care about, I didn't understand what > TotalMix will do on HDSP9652 and under Linux. > > Thanks in advance to anyone who will help! > Michele > Hi Michele, The hardware mixer that comes with the HDSP 9652 is a very flexible way of controlling the way audio signals are routed inside the card. Basically you can route any incoming signal or software playback channel to any physical output with a gain ranging from -oo dB to +6 dB. This is done in hardware, so it doesn't impact the cpu load in any way, and is very low latency (2 samples). The card also does hardware peak and RMS calculation on all channels. Totalmix is the frontend provided by RME to control this hardware mixer and display the meters. I wrote a linux clone of this application, hdspmixer, that's shipped with the alsa-tools package. Thomas
