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audiovolume
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audiovolume [2019/02/21 23:38] sq3plx |
audiovolume [2021/06/15 15:24] sq3plx |
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| + | >This page is only applicable if you are using ULARI Radio Interface or ULARI ECO Radio Interface which are connected to external radio. For ULARI Transceiver you do not need to change anything in volume control, because it is already properly set for built-in radio module! | ||
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| ====== Radio audio volume ====== | ====== Radio audio volume ====== | ||
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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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