Transcription player

[DamRsn]

Created a simple additive synthesizer that can play the transcription.

The transcription parameters can be changed while playing and the sound will follow.

Current features:

• Play/Pause and Reset buttons
• Clickable playhead

Features to add on another PR:

• Play recorded audio at the same time with independent levels for original audio and synthesized transcription.
• See how it's possible to link Play/Pause button with space bar and Enter with Reset
• Update design for buttons