GR-MEGA firmware 1.5.2 release notes

A bugfix release, with minor feature additions.

Date: 15 December 2025

new features:

- #1661 ability to edit slices and loop flags while in audition.
- #1658 audition - pos fader now works correctly on a zoomed-in sample. 
- Sampler and Tape sound engines now show "WINDOW OFF" in the window section of the display.
- (1.5.2-b2) Sampling menu - auto sized buffer - popup notifying user to first initialize. 
- [Shift] + [Enter] = undo. Basically the same as pressing the preset button. 

changes:

- slightly faster boot (after it became slower in 1.5)

bugfixes:

- #1677 Recording to wav file was broken.
- #1667 Sending 0xFF (MIDI reset) caused reload of the entire project (taking seconds, and losing MIDI data). Now it just quickly stops and resets everything. 
- #1670 wrong offset with crop followed by save, followed by copy and paste to another preset. 
- #1668 When shifting focus from a phase vocoder layer to a granular layer the window graphics were not refreshed.
- #1660 Resampling - volume was boosted x4, caused clipping. 
- Brought back "🔴 recordings/bla_xxxx.wav" and "🔴 resampling/bla_xxxx.wav" OSD messages.
- #1669 Multitimbral - when refocusing or disabling layers, copy took the wrong preset.
- #1679 Toggling layer off and on again, did not retrigger the play voice.
- #1636 Sequencer notes sometimes hanging at stop, when using external clocking. 
- #1589 Seq LEDs: [Seq]+[Play] start Sequencer, followed by [Play] (in order to stop) didn't refresh step LEDs. 
- #1655 Sample waveform was upside-down.
- (1.5.2-b2) fx menu - width of columns reduced to avoid left columns pushing out the right.

known issues:

- various MIDI CC's to still be implemented: glide, arp mode, scan mode, recording/sampling levels, window settings 
- high cpu load when connected to Macs via USB C, and using USB audio + MIDI + file sharing