I sampled a Bontempi GT709 System 5 synth to check the differance of sound recording of my Iphone 11 compared to my Experia IV and like that i removed some reverb and background noise to focus on the synth.

I still had to clean the recording in Audacity to remove noise but it sadly came back after i added OTT.

The music sound weird because the og recording where made at a higher bpm than the final result so i had to cut and readjust the partition plus i was drifting away from the bpm at time while playing on the synth and my phone almost fall of.