Do I have this right?

[Niatross]

Do I have this right?

Each sound device is assigned a unit number (ex: "pcm0", "pcm1", "pcm2", etc).
Each mixer device is assigned a unit number ("mixer0", "mixer1", "mixer2", etc).
Each sound device will have a mixer device assigned to it (ex: "pcm0" will be assigned to "mixer0", "pcm1" will be assigned to "mixer1", "pcm2" will be assigned to "mixer2").
The sound device and mixer device unit numbers correlate to one another.

If not, could somebody please correct it?

I'm trying to make sure I understand this.

I'm new to this and cannot find anything on the net to confirm this is correct. I have some FreeBSD books and they don't even make it clear if sound device and mixer device unit numbers correlate to one another.

 

[fonz]

Each sound device is assigned a unit number (ex: "pcm0", "pcm1", "pcm2", etc).

For what it's worth: on the system I'm currently on (which is still running FreeBSD-8 so things may have changed since then) there are plenty of /dev/ entries such as /dev/mixer* and /dev/sndstat but no /dev/pcm* entries.

More to the point: why are you asking, do you have a specific problem or are you trying to accomplish something specific?

Fonz

 

[Niatross]

For what it's worth: on the system I'm currently on (which is still running FreeBSD-8 so things may have changed since then) there are plenty of /dev/ entries such as /dev/mixer* and /dev/sndstat but no /dev/pcm* entries.

More to the point: why are you asking, do you have a specific problem or are you trying to accomplish something specific?

Fonz

I'm just trying to understand the FreeBSD sound system better. I understand what your saying when you say there are no "/dev/pcm" entries, but if you look in your system message buffer (DMESG), you will see that your sound devices are assigned a PCM unit number.

 

[fonz]

I'm not 100% sure, but it's highly likely that your pcmX devices and /dev/mixerX entries will match (in terms of X). In fact, I'd be very surprised if they didn't.

Fonz