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audiovolume
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audiovolume [2019/02/21 23:38] 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! | ||
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| + | === Audio output levels for different Lineout volume control values: === | ||
| + | * 10 - 30 mV | ||
| + | * 23 - 52 mV | ||
| + | * 32 - 84 mV | ||
| + | * 42 - 134 mV | ||
| + | * 52 - 218 mV | ||
| + | * 61 - 364 mV | ||
| + | * 71 - 592 mV | ||
| + | * 81 - 1000 mV | ||
| + | * 90 - 1620 mV | ||
| + | * 100 - 2740 mV | ||
| Every change will immediately be visible in real analog level. After setting these values to desired levels we can save them to nonvolatile memory using command: | Every change will immediately be visible in real analog level. After setting these values to desired levels we can save them to nonvolatile memory using command: | ||
audiovolume.txt ยท Last modified: 2021/06/15 15:31 by sq3plx
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