Re: Draws TX ADC level setting not working for me #draws


Annaliese McDermond
 

If you use the curses based alsamixer it will show output in dB. 0dB is pretty close to clipping with a full range input signal. I usually start there.

On Dec 7, 2018, at 2:41 PM, Basil Gunn <@basil860> wrote:



What value should PCM start ?
0
(Is 0 a multiplier of 1.0?)
Not sure.
Only know that multiplier is determined from this value.

You can control left & right channels independently. Look at:

man alsamixer

/Basil


On Fri, Dec 7, 2018 at 1:54 PM Basil Gunn <@basil860> wrote:


alsa controls ADC, PCM, LO Driver Gain

DAC input ie. receive level
ADC is an input digital control
Adjust for around 50 from direwolf output

DAC output ie. transmit level
PCM output digital control
- output samples are multiplied by a value determined by this control
LO Driver Gain (controls analog amp)

Adjust LO Driver Gain first
If you can't get close enough with LO Driver then use PCM
/Basil

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