Bug 184646

Summary:	Aliasing with Web Audio API / getUserMedia
Product:	WebKit	Reporter:	Joe Todd <joe>
Component:	Web Audio	Assignee:	Nobody <webkit-unassigned>
Status:	NEW
Severity:	Blocker	CC:	eric.carlson, jer.noble, joe, webkit-bug-importer, youennf
Priority:	P2	Keywords:	InRadar
Version:	Safari 11
Hardware:	Mac
OS:	macOS 10.13

Joe Todd

Reported 2018-04-16 05:47:55 PDT

analyser: https://analyser.chirp.io generator: http://onlinetonegenerator.com/ Steps to Reproduce ------------------ 1. Visit https://analyser.chirp.io or equivalent Web Audio API analyser in Safari 11. 2. Play a tone around 11kHz, and 12kHz 3. You will see the mirrored effects of aliasing. Actual Results -------------- Frequencies above 11kHz are mirrored and cannot be used. Expected Results ---------------- The sample rate used by the FFT should match that output by the audioContext.sampleRate. Build Date & Hardware --------------------- macOS 10.13.3 and 10.13.4 Safari 11.0.2 and 11.1 Additional Builds and Platforms ------------------------------- iOS 11.3

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Radar WebKit Bug Importer

Comment 1 2018-04-17 17:45:00 PDT

<rdar://problem/39511997>

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