Re: [alsa-devel] [PATCH 1/1] ALSA: virtuoso: add de-emphasis control

tom.ty89@gmail.com wrote:

• switch (data->current_rate) {
• case 32000:
• case 64000:

• reg |= PCM1796_DMF_32;
  

• break;
  

• case 44100:
• case 88200:
• case 176400:

• reg |= PCM1796_DMF_441;
  

• break;
  

• case 48000:
• case 96000:
• case 192000:

• reg |= PCM1796_DMF_48;
  

• break;
  

The DAC does not have filters for frequencies higher than 48 kHz.

+static const struct snd_kcontrol_new deemph_control = {

• .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
• .name = "De-emphasis Switch",

This should be called "De-emphasis Playback Switch". (But I see that other drivers are quite inconsistent about this.)

Regards, Clemens