Patrick Shirkey wrote: > Mark Knecht wrote: > >>> Another thing about the quattro is that even the windows drivers will >>> not allow you to record and playback on all 4 channels at one time. >>> >>> You can use >>> >>> 4 in, 2 out 48khz 24 bit >>> 2 in, 4 out >>> 2 in, 2 out 94 khz 24 bit >>> >>> I think I am running up against this with my latest attempts. It may be >>> that the quattro cannot do all 8 channels because of a hardware switch >>> maybe for power consumption or something. They do run awfully hot and I >>> can imagine that it would be possible to melt something if their is too >>> much power running through them. >>> >> >> >> USB 1.0/1.1 is built on a 12Mb/Sec physical layer. >> >> 96000 * 24-bits * 4-channels = 9.216Mb/S if I did the calculations >> correctly. > > > that should be divided by three to get bytes as there are 8 bits in > every byte the quattro uses 24 with 3 periods (not packed in four like > other cards). > > 24 * 3 bytes * 48000 = 3072000 bytes > => 3072 Kb > => 3.072 Mb/S > Doh, 96000 * 3 * 24 = what Tobiah said. Better to read his explanation than mine as mine was still a bit confused. -- Patrick Shirkey - Boost Hardware Ltd. Http://www.boosthardware.com Http://www.djcj.org - The Linux Audio Users guide ======================================== Being on stage with the band in front of crowds shouting, "Get off! No! We want normal music!", I think that was more like acting than anything I've ever done. Goldie, 8 Nov, 2002 The Scotsman
