[Alsa-user] aplay error: "Channels count non available"

[Dean A. <dea...@me...>]

When I try to use aplay to play a wav file via a virtual multi channel
device configured in /etc/asound.conf I keep getting the following
error:

#aplay -D multi qrs.wav
Playing WAVE 'qrs.wav' : Signed 16 bit Little Endian, Rate 6000 Hz, Mono
aplay: set_params:862: Channels count non available

Does anyone know what might be causing this and how I can fix it?

My Configuration:

x86 Fedora Core 2 system, 2.6.8.1 kernel from kernel.org, ALSA 1.0.7rc2.
(1) Micronas UAC3556B USB Codec and (1) AC97 compliant Codec connected
to Intel ICH4 southbridge chip.

My modprobe.conf file:

# Note: for use under 2.4, changes must also be made to modules.conf!
alias eth0 e1000
alias usb-controller ehci-hcd
#alias snd-card-0 snd-intel8x0
alias usb-controller1 uhci-hcd
#install sound-slot-0 /sbin/modprobe --first-time --ignore-install
sound-slot-0 && { /bin/aumix-minimal -f /etc/.aumixrc -L >/dev/null 2>&1
|| :; }
#remove sound-slot-0 { /bin/aumix-minimal -f /etc/.aumixrc -S >/dev/null
2>&1 || :; } ; /sbin/modprobe -r --first-time --ignore-remove
sound-slot-0

#Added by Dean Andreakis 10/11/2004
# ALSA portion
alias char-major-116 snd
alias snd-card-1 snd-usb-audio
alias snd-card-0 snd-intel8x0

# module options should go here
# OSS/Free portion
alias char-major-14 soundcore
alias sound-slot-1 snd-card-1
alias sound-slot-0 snd-card-0

# card #0
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss

#card #1
alias sound-service-1-0 snd-mixer-oss
alias sound-service-1-1 snd-seq-oss
alias sound-service-1-3 snd-pcm-oss
alias sound-service-1-8 snd-seq-oss
alias sound-service-1-12 snd-pcm-oss

My /etc/asound.conf file:

# create a virtual four-channel device with two sound devices:
# This is in fact two interleaved stereo streams in
# different memory locations, so JACK will complain that it
# cannot get mmap-based access. see below.

        pcm.multi {
                type multi;
                slaves.a.pcm "hw:0,0";
                slaves.a.channels 2;
                slaves.b.pcm "hw:1,0";
                slaves.b.channels 2;
                bindings.0.slave a;
                bindings.0.channel 0;
                bindings.1.slave a;
                bindings.1.channel 1;
                bindings.2.slave b;
                bindings.2.channel 0;
                bindings.3.slave b;
                bindings.3.channel 1;
        }

        # JACK will be unhappy if there is no mixer to talk to, so we
set
        # this to card 0. This could be any device but 0 is easy.

        ctl.multi {
                type hw;
                card 0;
        }

        # This creates a 4 channel interleaved pcm stream based on
        # the multi device. JACK will work with this one.

        pcm.ttable {
                type route;
                slave.pcm "multi";
                ttable.0.0 1;
                ttable.1.1 1;
                ttable.2.2 1;
                ttable.3.3 1;
        }
        # see above.
        ctl.ttable {
                type hw;
                card 0;
        }

-dean andreakis