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audiovolume [2019/02/27 15:32] sq3plx |
audiovolume [2019/02/27 15:45] sq3plx |
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OK, so we are only going to touch options which are important for us, these are: | OK, so we are only going to touch options which are important for us, these are: | ||
- | * **"Lineout volu" (Lineout volume control)** - this controls the audio output signal level (from ULARI to radio). Lowest values result in a signal of about few milivolts (do not use levels 0 and 3 as they are really no signal according to my oscilloscope). Highest values result in a signal of more than 1Vpp (TODO: check exact signal amplitudes for each level). | + | * **"Lineout volu" (Lineout volume control)** - this controls the audio output signal level (from ULARI to radio). Lowest values result in a signal of about few milivolts (do not use levels 0 and 3 as they are really no signal according to my oscilloscope). Highest values result in a signal of more than 1Vpp. |
* **"ADC input ga" (ADC input gain ctrl)** - this controls the audio input amplification (from radio to ULARI). Do not set it too high or your audio signal may be clipped and decoding will work very poor (TODO: check exact signal amplitudes for each level). | * **"ADC input ga" (ADC input gain ctrl)** - this controls the audio input amplification (from radio to ULARI). Do not set it too high or your audio signal may be clipped and decoding will work very poor (TODO: check exact signal amplitudes for each level). | ||
* **"MIC1 boost A" (MIC1 boost AMP gain control)** - this also controls the audio input amplification (different stage), but this value is hardcoded in kernel settings and will restore every time to the same value, better do not touch! | * **"MIC1 boost A" (MIC1 boost AMP gain control)** - this also controls the audio input amplification (different stage), but this value is hardcoded in kernel settings and will restore every time to the same value, better do not touch! | ||
- | Audio output levels for different Lineout volume control values: | + | === Audio output levels for different Lineout volume control values: === |
* 10 - 30 mV | * 10 - 30 mV | ||
* 23 - 52 mV | * 23 - 52 mV |