Just wondering if we should create our own audio thumbnails or is their a way to modify audio thumbnail class to look nicer specially when zoomed in
AudioThumbnail constructor takes a sourceSamplesPerThumbnailSample parameter. Try increasing it for better results when zoomed in. As for general ways to make it look better in terms of graphic design (color gradients etc’) look into AudioThumbnail::drawChannel.
Solved the issue here included some code. My case was i need to render my synth voice. works for basic voices of reasonable length tried 4 seconds so far.