Re: USB sound device questions (multiples!)
On Wednesday 21 January 2004 02:53, Ethan wrote: Hello all, I am thinking about trying to use 4 to 6 USB sound devices on a single FreeBSD system. Can anyone advise me if I will run into a case where on every reboot they all get different pcmX devices? Or will they stay static? If they are all plugged in during boot they will get probed in the same order every time you boot, so yes, they will be static. Be sure to calculate if you have enough bandwidth available to drive such a great number of devices at the same time though : 48KHz * 16-bits sample * stereo * 6 devices = about 48 * 2 * 2 * 6 = 1152 KB/sec . That's about the maximum you can get over USB 1.0, so I'm not sure if you will be able to use them all at the same time at maximum playback rate... So it depends on the quality and sample-rate you need. grtz, Daan ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: USB sound device questions (multiples!)
If they are all plugged in during boot they will get probed in the same order every time you boot, so yes, they will be static. Okay, because this is going to be a fixed installation that will be pretty much hands off. Be sure to calculate if you have enough bandwidth available to drive such a great number of devices at the same time though : 48KHz * 16-bits sample * stereo * 6 devices = about 48 * 2 * 2 * 6 = 1152 KB/sec . That's about the maximum you can get over USB 1.0, so I'm not sure if you will be able to use them all at the same time at maximum playback rate... So it depends on the quality and sample-rate you need. I figured I would split them across two USB interface cards? ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: USB sound device questions (multiples!)
On Wednesday 21 January 2004 13:47, you wrote: If they are all plugged in during boot they will get probed in the same order every time you boot, so yes, they will be static. Okay, because this is going to be a fixed installation that will be pretty much hands off. Be sure to calculate if you have enough bandwidth available to drive such a great number of devices at the same time though : 48KHz * 16-bits sample * stereo * 6 devices = about 48 * 2 * 2 * 6 = 1152 KB/sec . That's about the maximum you can get over USB 1.0, so I'm not sure if you will be able to use them all at the same time at maximum playback rate... So it depends on the quality and sample-rate you need. I figured I would split them across two USB interface cards? That should solve the bandwidth problems yes... good luck, Daan ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
USB sound device questions (multiples!)
Hello all, I am thinking about trying to use 4 to 6 USB sound devices on a single FreeBSD system. Can anyone advise me if I will run into a case where on every reboot they all get different pcmX devices? Or will they stay static? We currently use systems with 6 - 8 PCI cards in them, but this new site is space limited so I'm thinking USB dongles are the way to go. I need to record audio from it for a public streaming audio site (www.hrconnect.com). Any advice is appreciated. The concern is on reboot if the /dev tree is built differently then the feeds will hit the wrong mountpoints. Also, any suggestions on the cheapest USB input device the works? ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
