4 Mar
2003
4 Mar
'03
9:31 a.m.
-d should allow me to specify a device, but I have no
idea in what syntax
this is for which card. I tried a few things:
- specifying 0 and 1
- specifying 15 and 15_1, the card ids
- specifying "spdif" (based on output of arecord -L, but I don't know how
I would choose between cards in that case)
- specifying random numbers, which seems to do something even though I
can't imagine what it would be recording from in those cases.
in general, the best answer is typically:
arecord -d plughw:0
the "plughw" name allows to specify parameters (sample rate, bit
depth, channel count etc.) that are *not* supported by the hardware,
which is good because the hammerfall h/w supports *only* 26 channels,
24-in-32 bit samples, non-interleaved.
So basically, my questions are :
a) is there some alsa-enabled recorder that allows me to choose devices
easily and allows for monitoring the incoming signal ?
not in the way that you are thinking of. there are substantial
programs like ardour, ecasound and muse that can do this. arecord is a
toy program, and should not be considered indicative of the toolsuite
available for recording under linux. the problem is that nobody has
felt the need to write a "simple command-line recorder". i think that
the editors like snd, sweep, audacity and so forth will all allow you
to do basic recording too, and i would recommend that you consider
these. see www.linux-sound.org for more ideas.
b) what is the correct way (or a doc describing it) to
specify devices for
arecord ?
you specify the name of a device that is defined in the ALSA
configuration files, including your own ~/.asoundrc and the system
one.
Is arecord using the "ALSA-standard" way
of doing this, as is
done in other applications ?
yes. its completely standard for all ALSA-native applications.
c) could I have forgotten anything else here when
trying to record stuff ?
I assume that, since the Hammerfall doesn't have a mixer chip, the channel
is always-on.
if the card is running, then data flows to the channel.
i don't keep much email around, and to be honest, i have forgotten
what you were trying to do.
--p