>From G3PLX: Greetings to the group. Can anyone here help me with some questions in the art of driving the Presonus Firebox?
The background is that I have been given a Firebox as an unsolicited gift. All the DSP/SDR software I have written has been for 16-bit soundcards, and I found the Firebox runs fine in this mode, especially at the 8kHz samplerate which I use most. What I want to do now is explore the 24-bit capability. I had always had this idea in my head that 24-bits was a sales gimmick and 16 was plenty, but now I have a 24-bit box on the bench, I have no excuse - I must make the effort and actually write some 24-bit code. Although I thought originally that the Windows mmsystem API would do 24-bit (the format would seem to be able to handle it), the Firebox refuses to do it via that route. I had therefore to explore other ways. The 'ASIO' API seemed promising, so I downloaded 'openasio.dll' and the Delphi wrapper (yes I still write in Delphi!), and soon had 24-bit noises emerging from those quaint old 1/4" jack sockets. But only at 44.1, 48, 88.2, and 96kHz samplerate. I don't need these speeds (I do all my SDR at zero I.F) and I really don't want to have to decimate from 48 down to 8kHz just because the hardware won't slow down! So my question is: how can I run the Firebox at 8kHz with 24-bit audio? The only way to change samplerate seems to be via the Firebox control panel, and that only lists 44/48/88/96 in it's drop-down menu. Is there a documented way to change the samplerate programmatically, and can than do 8kHz? I have lot's more questions. If there's someone out there who has already cracked the Firebox and could spare the time to help shorten my learning curve, I would be grateful. 73 Peter G3PLX _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
