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Description

Get or set treble for one or all logical channels inside a cluster.

Files

usbd_audio_drv_<codec-name>.h / usbd_audio_drv_<codec-name>.c

Prototype

Arguments

p_audio_drv

Pointer to audio driver structure.

req

Treble request:

USBD_AUDIO_REQ_GET_CUR
USBD_AUDIO_REQ_GET_RES
USBD_AUDIO_REQ_GET_MIN
USBD_AUDIO_REQ_GET_MAX
USBD_AUDIO_REQ_SET_CUR

unit_id

Feature Unit ID.

log_ch_nbr

Logical channel number.

p_treble

Pointer to the Treble value to set or get.

Returned Value

DEF_OK, if NO error(s) occurred and request is supported.

DEF_FAIL, otherwise.

Callers

Audio Class.

Implementation guidelines

  1. The Treble Control values range allowed for Feature Unit is:
    1. From +31.75 dB (0x7F) down to –32.00 dB (0x80) for CUR, MIN, and MAX attributes.
    2. From 0.25 dB (0x01) to +31.75 dB (0x7F) for RES attribute.
  2. log_ch_nbr allows you to get or set the treble for a specific channel. When log_ch_nbr is 0, you get or set the treble for all channels. Indeed, the logical channel #0 represents the master channel and encompasses all channels.
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