[pulseaudio-discuss] volume limiter - is this possible in pulseaudio?

[Sanjeev Sharma]

one more update

with  this .asoundrc::::
pcm.limit {
      type ladspa
      slave.pcm "plughw:0,0";
      #slave.pcm "default";
      path "/usr/lib/ladspa";
      plugins [
          {
              label fastLookaheadLimiter
              input {
               controls [ 0 -10 0.01 ]
              }
          }
     ]
}


this doesn't play
mplayer /usr/share/xemacs21/xemacs-packages/etc/sounds/hammer.wav  -ao
alsa:device=limit

this is the error:
[AO_ALSA] Unable to set access type: Invalid argument

but this plays fine:
aplay -v -Dplug:limit
/usr/share/xemacs21/xemacs-packages/etc/sounds/hammer.wav

Here's the log from aplay - Anyone see something useful applicable to
pulseaudio?  I still get the same error in pacmd as before


Playing WAVE '/usr/share/xemacs21/xemacs-packages/etc/sounds/hammer.wav' :
Unsigned 8 bit, Rate 8000 Hz, Mono
Plug PCM: Linear Integer <-> Linear Float conversion PCM (FLOAT_LE)
Its setup is:
  stream       : PLAYBACK
  access       : RW_INTERLEAVED
  format       : U8
  subformat    : STD
  channels     : 1
  rate         : 8000
  exact rate   : 8000 (8000/1)
  msbits       : 8
  buffer_size  : 4000
  period_size  : 1000
  period_time  : 125000
  tick_time    : 0
  tstamp_mode  : NONE
  period_step  : 1
  sleep_min    : 0
  avail_min    : 1000
  xfer_align   : 1000
  start_threshold  : 4000
  stop_threshold   : 4000
  silence_threshold: 0
  silence_size : 0
  boundary     : 9007199254740992000
Slave: LADSPA PCM
  Playback:
    Policy: none
    Filename: /usr/lib/ladspa/fast_lookahead_limiter_1913.so
    Plugin Name: Fast Lookahead limiter
    Plugin Label: fastLookaheadLimiter
    Plugin Unique ID: 1913
    Instances:
      Depth: 0
         InChannels: 0, 1
         InPorts: 4 "Input 1", 5 "Input 2"
         OutChannels: 0, 1
         OutPorts: 6 "Output 1", 7 "Output 2"
    Control input port initial values:
      0 "Input gain (dB)" = 0.00000000
      1 "Limit (dB)" = -10.00000000
      2 "Release time (s)" = 0.01000000
    Control output port initial values:
      3 "Attenuation (dB)" = 0.00000000
      8 "latency" = 0.00000000
  Capture:
Its setup is:
  stream       : PLAYBACK
  access       : MMAP_NONINTERLEAVED
  format       : FLOAT_LE
  subformat    : STD
  channels     : 1
  rate         : 8000
  exact rate   : 8000 (8000/1)
  msbits       : 32
  buffer_size  : 4000
  period_size  : 1000
  period_time  : 125000
  tick_time    : 0
  tstamp_mode  : NONE
  period_step  : 1
  sleep_min    : 0
  avail_min    : 1000
  xfer_align   : 1000
  start_threshold  : 4000
  stop_threshold   : 4000
  silence_threshold: 0
  silence_size : 0
  boundary     : 9007199254740992000
Slave: Plug PCM: Linear Integer <-> Linear Float conversion PCM (S16_LE)
Its setup is:
  stream       : PLAYBACK
  access       : MMAP_NONINTERLEAVED
  format       : FLOAT_LE
  subformat    : STD
  channels     : 1
  rate         : 8000
  exact rate   : 8000 (8000/1)
  msbits       : 32
  buffer_size  : 4000
  period_size  : 1000
  period_time  : 125000
  tick_time    : 0
  tstamp_mode  : NONE
  period_step  : 1
  sleep_min    : 0
  avail_min    : 1000
  xfer_align   : 1000
  start_threshold  : 4000
  stop_threshold   : 4000
  silence_threshold: 0
  silence_size : 0
  boundary     : 9007199254740992000
Slave: Hardware PCM card 0 'SBLive! Value [CT4832]' device 0 subdevice 0
Its setup is:
  stream       : PLAYBACK
  access       : MMAP_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 1
  rate         : 8000
  exact rate   : 8000 (8000/1)
  msbits       : 16
  buffer_size  : 4000
  period_size  : 1000
  period_time  : 125000
  tick_time    : 0
  tstamp_mode  : NONE
  period_step  : 1
  sleep_min    : 0
  avail_min    : 1000
  xfer_align   : 1000
  start_threshold  : 4000
  stop_threshold   : 4000
  silence_threshold: 0
  silence_size : 0
  boundary     : 9007199254740992000
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