Volume control for preamp out

[Gouwa]

Howdy Folks!

Sorry for the delay due to more time for testing, please forward to:

Tone2 Pro - Firmware v1.30 (Line-Out Volume Adjustment & More!)

[video_thumb] Hello Community! We’ve just released the v1.30 firmware for your Tone2 Pro, download it from: https://dl.khadas.com/products/tone2/firmware/tone2_pro/tone2_pro_firmware_v1.30_210730.zip Changelog: Added the pre-amp feature (when enabled, line-out volume is controlled by the volume knob) Added LED indicator lights for pre-amp (3 green lights) Added a feature in which the volume gradually increases from zero on startup Fixed an issue in which the DSD format caused the input pri…

Have fun!