RPi3 Allo BOSS and SoX settings

[philrandal]

Can Alsamixer card gain be set to persist through bootup by adding a command to a config file or start-up script?

As mentioned in Phil's post, The 4db attenuation when upsampling with SOX is important to minimise overmodulation.

The screen grab is from my Pi4 to HiFiBerry's new USB to I2S interface card and HiFiBerry Digi plus.
So far working very well with SoX set for 32/384 and Alsamixer at -4db as shown. 

Richard

https://www.hifiberry.com/docs/data-shee...et-usbi2s/[url=https://www.hifiberry.com/docs/data-sheets/datasheet-usbi2s/][/url]

Do you actually notice the difference with the 4dB attenuation?  And if so, what's the perceived effect?  Just curious.

Phil