Equalizer¶
Provided in this API equalizer supports:
- fixed number of ten (10) bands;
- four sample rates: 11025 Hz, 22050 Hz, 44100 Hz and 48000 Hz.
The center frequencies of bands are shown in table below.
| Band Index | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|
| Frequency | 31 Hz | 62 Hz | 125 Hz | 250 Hz | 500 Hz | 1 kHz | 2 kHz | 4 kHz | 8 kHz | 16 kHz |
Default gain of each band is -13 dB. To set the gains of all bands use structure equalizer_cfg. To set the gain of individual band use function equalizer_set_gain_info().
Application Example¶
Implementation of this API is demonstrated in the audio_processing/equalizer example.