Calibration doesn't work in Safari

[glynnbird]

To repoduce

1. Create a lead part of a song
2. Go to create a second part and Choirless will attempt to calibrate your audio

Safari plays the piano tones 3 times but the JavaScript console returns:

[Log] detectedFrequenciesSequence: – [] (0) (001joiWN1Hdgfw1smorG09GoUj0B0E8O, line 128)
[Log] detectedFrequenciesSequence: – [] (0) (001joiWN1Hdgfw1smorG09GoUj0B0E8O, line 128)
[Log] detectedFrequenciesSequence: – [] (0) (001joiWN1Hdgfw1smorG09GoUj0B0E8O, line 128)

It appears not to be able to "hear" the played-back tones.

[seanmtracey]

Safari doesn't have the APIs we need to make Choirless work. Web Audio and Media Recorder are in their experimental releases, but whether they come to the for anytime soon remains to be seen.