[pulseaudio-discuss] Can't get Pulseadio to playback stream on Raspbian with HifiBerry DAC+

[Raymond Yau]

>
> I'll check HiFiBerry's site and see if I can get it.
>

https://www.hifiberry.com/dacplus/

What is the label on the black DAC chip ?

Aplay/Arecord output
!!--------------------

APLAY

**** List of PLAYBACK Hardware Devices ****
card 0: sndrpihifiberry [snd_rpi_hifiberry_dacplus], device 0: HiFiBerry
DAC  HiFi pcm512x-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

ARECORD

**** List of CAPTURE Hardware Devices ****

Seem half duplex

Simple mixer control 'PCM',0
  Capabilities: volume penum
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 215
  Front Left: 172 [80%]
  Front Right: 172 [80%]
Simple mixer control 'DSP Program',0
  Capabilities: enum
  Items: 'FIR interpolation with de-emphasis' 'Low latency IIR with
de-emphasis' 'High attenuation with de-emphasis' 'Fixed process flow'
'Ringing-less low latency FIR'
  Item0: 'FIR interpolation with de-emphasis'
Simple mixer control 'Playback',0
  Capabilities: volume penum
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 1
  Front Left: 0 [0%] [-6.00dB]
  Front Right: 0 [0%] [-6.00dB]
Simple mixer control 'Playback Boost',0
  Capabilities: volume penum
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 1
  Front Left: 0 [0%] [0.00dB]
  Front Right: 0 [0%] [0.00dB]
Simple mixer control 'Auto Mute',0
  Capabilities: pswitch penum
  Playback channels: Front Left - Front Right
  Mono:
  Front Left: Playback [on]
  Front Right: Playback [on]
Simple mixer control 'Auto Mute Mono',0
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'Auto Mute Time Left',0
  Capabilities: enum
  Items: '21ms' '106ms' '213ms' '533ms' '1.07s' '2.13s' '5.33s' '10.66s'
  Item0: '21ms'
Simple mixer control 'Auto Mute Time Right',0
  Capabilities: enum
  Items: '21ms' '106ms' '213ms' '533ms' '1.07s' '2.13s' '5.33s' '10.66s'
  Item0: '21ms'
Simple mixer control 'Clock Missing Period',0
  Capabilities: enum
  Items: '1s' '2s' '3s' '4s' '5s' '6s' '7s' '8s'
  Item0: '1s'
Simple mixer control 'Deemphasis',0
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'Digital',0
  Capabilities: pswitch penum
  Playback channels: Front Left - Front Right
  Mono:
  Front Left: Playback [on]
  Front Right: Playback [on]
Simple mixer control 'Volume Ramp Down Emergency Rate',0
  Capabilities: enum
  Items: '1 sample/update' '2 samples/update' '4 samples/update' 'Immediate'
  Item0: '1 sample/update'
Simple mixer control 'Volume Ramp Down Emergency Step',0
  Capabilities: enum
  Items: '4dB/step' '2dB/step' '1dB/step' '0.5dB/step'
  Item0: '4dB/step'
Simple mixer control 'Volume Ramp Down Rate',0
  Capabilities: enum
  Items: '1 sample/update' '2 samples/update' '4 samples/update' 'Immediate'
  Item0: '1 sample/update'
Simple mixer control 'Volume Ramp Down Step',0
  Capabilities: enum
  Items: '4dB/step' '2dB/step' '1dB/step' '0.5dB/step'
  Item0: '1dB/step'
Simple mixer control 'Volume Ramp Up Rate',0
  Capabilities: enum
  Items: '1 sample/update' '2 samples/update' '4 samples/update' 'Immediate'
  Item0: '1 sample/update'
Simple mixer control 'Volume Ramp Up Step',0
  Capabilities: enum
  Items: '4dB/step' '2dB/step' '1dB/step' '0.5dB/step'
  Item0: '1dB/step'

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/sound/soc/codecs/pcm512x.c

Seem not your dacplus

>> diff --git a/src/modules/alsa/alsa-util.c b/src/modules/alsa/alsa-util.c
>> index bb79e71..e36c2a7 100644
>> --- a/src/modules/alsa/alsa-util.c
>> +++ b/src/modules/alsa/alsa-util.c
>> @@ -481,7 +481,7 @@ int pa_alsa_set_sw_params(snd_pcm_t *pcm,
snd_pcm_uframes_t avail_min, bool peri
>>          return err;
>>      }
>>
>> -    if ((err = snd_pcm_sw_params_set_start_threshold(pcm, swparams,
(snd_pcm_uframes_t) -1)) < 0) {
>> +    if ((err = snd_pcm_sw_params_set_start_threshold(pcm, swparams,
boundary)) < 0) {
>>          pa_log_warn("Unable to set start threshold: %s\n",
pa_alsa_strerror(err));
>>          return err;
>>      }
>>

Do this patch fix your problem ?
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