Cocoa Audio Player

Closed Posted May 23, 2009 Paid on delivery
Closed Paid on delivery

A document based Cocoa application for playing audio. It should include a waveform display with a playhead for scrubbing, and the ability to speed up and slow down playback (using Apple's AUTimePitch audio unit).

## Deliverables

I have an idea for an audio application, but it's been a long time since I've done any Cocoa or Core Audio programming, so I'd like to have someone more experienced write the basic foundations.

When you open a file it should show a nice preview of the waveform. You should

be able to zoom in horizontally on the waveform, and scroll around. It should

have buttons for your standard controls - play pause, stop, go back to the

beginning. There should be a playhead which moves as the file plays, and the

waveform should scroll with the playhead. You should also be able to drag the

playhead to move around within the file.

I would also like a slider to control playback speed (using the AUTimePitch

audio unit). The playhead should stay in sync with the modified playback speed.

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Project ID: #3901340

About the project

Remote project Active Jun 16, 2009