Possible IOS 9 audio fix for slow audio

[chrisschaub]

Possible fix for ios 9 slow / distorted audio.

[nehz]

Curious, why offlineAudioContext ?

[chrisschaub]

Well, it was the only way I could set the rate to 44100, other attempts
didn't set the buffer correctly.

On Tue, Feb 9, 2016 at 8:35 PM, Zhen Wang notifications@github.com wrote:

Curious, why offlineAudioContext ?

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Reply to this email directly or view it on GitHub
#8 (comment).

Christopher Schaub
http://chris.schaub.com

[chrisschaub]

The number was set, but you have to set it "before" decodeAudioData is run,
it seems to prime the pump.

On Tue, Feb 9, 2016 at 8:50 PM, Christopher Schaub chris@schaub.com wrote:

Well, it was the only way I could set the rate to 44100, other attempts
didn't set the buffer correctly.

On Tue, Feb 9, 2016 at 8:35 PM, Zhen Wang notifications@github.com
wrote:

Curious, why offlineAudioContext ?

—
Reply to this email directly or view it on GitHub
#8 (comment).

Christopher Schaub
http://chris.schaub.com

Christopher Schaub
http://chris.schaub.com

[nehz]

Right. That's weird ... not sure how Apple is messing it up as the offline buffer isn't even rendered yet (https://developer.mozilla.org/en-US/docs/Web/API/OfflineAudioContext), but somehow just initializing an offline buffer fixes the audio context?

[nehz]

Also was there a reason for choosing 2 audio channels for the offline buffer? (Trying to reverse engineer why it works)

[chrisschaub]

I'm actually testing touchend with this

https://github.com/Jam3/ios-safe-audio-context/blob/master/index.js

instead. More soon.

On Tue, Feb 9, 2016 at 9:42 PM, Zhen Wang notifications@github.com wrote:

Also was there a reason for choosing 2 audio channels for the offline
buffer? (Trying to reverse engineer why it works)

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Reply to this email directly or view it on GitHub
#8 (comment).

Christopher Schaub
http://chris.schaub.com

[chrisschaub]

What's the easiest way to disable webaudio and just fall back to html5
audio? I can't duplicate the issue on iphone 6s, just iphone 6. Apple needs
to fix this.

On Tue, Feb 9, 2016 at 9:43 PM, Christopher Schaub chris@schaub.com wrote:

I'm actually testing touchend with this

https://github.com/Jam3/ios-safe-audio-context/blob/master/index.js

instead. More soon.

On Tue, Feb 9, 2016 at 9:42 PM, Zhen Wang notifications@github.com
wrote:

Also was there a reason for choosing 2 audio channels for the offline
buffer? (Trying to reverse engineer why it works)

—
Reply to this email directly or view it on GitHub
#8 (comment).

Christopher Schaub
http://chris.schaub.com

Christopher Schaub
http://chris.schaub.com

[nehz]

Yeah I agree, can't duplicate issue on my actual iPad either.
You can null out AudioContext before angular is loaded:

window.AudioContext = window.webkitAudioContext = null;

But I'll probably push an update that allows this via a flag

[nehz]

Added flag to options to use HTML5 Audio cf8df07.
Also I added the safe-audio-context code to context init in case it helps some people (fingers crossed) 6b173f3.