[LAD] SysEx data-conversion woes: nibbles and complements (Microwave 2)

Hey hey, I have a problem. I'm trying to understand the Waldorf Microwave 2/xt's waveform data dump. The SysEx manual seems clear and direct enough, but I can't get anywhere. In short: these synthesizers can load 8bit single cycle waveforms. Only a half cycle is sent, the second half is created by "mirroring"/negating the first half: Wave[64+n] = -Wave[63-n] To store 8bit samples in the SysEx format, which can only use 7bit, the samples were split into nibbles. Here's what the SysEx manual says about conversion to a signed char: "... Not(e) that samples are not two's complement format, to get a signed byte, the most significant bit must be flipped: signed char s = Wave[n]^0x80; ..." The whole wave dump format is defined as: "f0 3e 0e Dev_id 12 location_1 location_2 "128 bytes of wave data" chksum f7" Wave Data: index range description 0 0-0f sample1, most significant nibble 1 0-0f sample 1, least significant nibble ... Knowing all that, I tried a few things, but still couldn't get any sensible result. Here's a wave dump of wave 1, which I assume is the sine wave Complete SysEx dump: https://www.dropbox.com/s/v50wq3x55bh52l8/full_wav_dump.syx Only the wave data (128 bytes): https://www.dropbox.com/s/q5rcm3cvtfp8cdu/pure_wave_data.dat Could someone please help me on how to convert one sample from this data and vice versa, please? Best wishes, Jeanette -- * Website: http://juliencoder.de - for summer is a state of sound * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g * Audiobombs: https://www.audiobombs.com/users/jeanette_c * GitHub: https://github.com/jeanette-c And I love the way with just one whisper You tell me everything <3 (Britney Spears)