Ok, I've pretty much narrowed down my problems with clock discrepancies
to the audio bitrate that my audio card is set to. I have a Chaintech
AV710 (uses Via Envy24HT) which seems to have problems playing at
48KHz. I'm not sure if the problem is with the card or my receiver, but
there's a lot of clicking and such at 48KHz. I've tried using .asoundrc
files that are supposed to convert signals at all frequencies to the
frequency set in alsamixer (currently 44100), modifying them to my
device indexes. When I use dmix it seems to convert the signal to the
correct frequency but when I don't it doesn't. What audio rates are
valid for pvr-350s and pvr-150mces? Attached is my .asoundrc if anyone
is interested. Here's what aplay -l says:
**** List of PLAYBACK Hardware Devices ****
card 0: AUDIO2000 [AMP Ltd AUDIO2000], device 0: ICE1724 [ICE1724]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: AUDIO2000 [AMP Ltd AUDIO2000], device 1: IEC1724 IEC958 [IEC1724
IEC958]
Subdevices: 1/1
Subdevice #0: subdevice #0
# Override the default output used by ALSA.
# If you do not override the default, your default
# device is identical to the (unmixed) analog device
# shown below. If you prefer mixed and/or digital
# output, uncomment the appropriate four lines below
# (only one slave.pcm line).
#pcm.!default {
# type plug
## Uncomment the following to use mixed analog by default
# slave.pcm "dmix-analog"
## Uncomment the following to use unmixed digital by default
# slave.pcm "digital-hw"
## Uncomment the following to use mixed digital by default
# slave.pcm "dmix-digital"
#}
# Alias for analog output on the Chaintech AV-710 (hw:0,0)
# - This is identical to the device named "default"--which
# always exists and refers to hw:0,0 (unless overridden)
# - Therefore, we can specify "hw:0,0", "default", or "analog"
# to access analog output on the Chaintech AV-710
pcm.analog {
type plug
slave.pcm "analog-hw"
}
# Control device (mixer, etc.) for the Chaintech AV-710 card
ctl.analog {
type hw
card 0
}
# Alias for (rate-converted) mixed analog output on the
# Chaintech AV-710 (hw:0,0)
# - This will accept audio input--regardless of rate--and
# convert to the rate required for the dmix plugin
# (in this case 48000Hz)
pcm.mixed-analog {
type plug
slave.pcm "dmix-analog"
}
# Control device (mixer, etc.) for the Chaintech AV-710 card
ctl.mixed-analog {
type hw
card 0
}
# Alias for (rate-converted) digital (S/PDIF) output on the
# Chaintech AV-710 (hw:0,1)
# - This will accept audio input--regardless of rate--and
# convert to the rate required for the S/PDIF hardware
# (in this case 48000Hz)
pcm.digital {
type plug
slave.pcm "digital-hw"
}
# Control device (mixer, etc.) for the Chaintech AV-710 card
ctl.digital {
type hw
card 0
}
# Alias for mixed (rate-converted) digital (S/PDIF) output on the
# Chaintech AV-710 (hw:0,1)
# - This will accept audio input--regardless of rate--and
# convert to the rate required for the S/PDIF hardware
# (in this case 48000Hz)
pcm.mixed-digital {
type plug
slave.pcm "dmix-digital"
}
# Control device (mixer, etc.) for the Chaintech AV-710 card
ctl.mixed-digital {
type hw
card 0
}
# The following devices are not useful by themselves. They
# require specific rates, channels, and formats. Therefore,
# you probably do not want to use them directly. Instead use
# of of the devices defined above.
# Alias for analog output on the Chaintech AV-710 (hw:0,0)
# Do not use this directly--it requires specific rate,
# channels, and format
pcm.analog-hw {
type hw
card 0
device 1
# The default value for device is 0, so no need to specify
}
# Control device (mixer, etc.) for the Chaintech AV-710 card
ctl.analog-hw {
type hw
card 0
}
# Alias for digital (S/PDIF) output on the Chaintech AV-710 (hw:0,1)
# Do not use this directly--it requires specific rate,
# channels, and format
pcm.digital-hw {
type hw
card 0
device 0
}
# Control device (mixer, etc.) for the Chaintech AV-710 card
ctl.digital-hw {
type hw
card 0
}
# Direct software mixing plugin for analog output on
# the Chaintech AV-710 (hw:0,0)
# Do not use this directly--it requires specific rate,
# channels, and format
pcm.dmix-analog {
type dmix
ipc_key 1234
slave {
pcm "analog-hw"
period_time 0
period_size 1024
buffer_size 4096
rate 48000
}
}
# Control device (mixer, etc.) for the Chaintech AV-710 card
ctl.dmix-analog {
type hw
card 0
}
# Direct software mixing plugin for digital (S/PDIF) output
# on the Chaintech AV-710 (hw:0,1)
# Do not use this directly--it requires specific rate,
# channels, and format
pcm.dmix-digital {
type dmix
ipc_key 1235
slave {
pcm "digital-hw"
period_time 0
period_size 1024
buffer_size 4096
rate 48000
}
}
# Control device (mixer, etc.) for the Chaintech AV-710 card
ctl.dmix-digital {
type hw
card 0
}
