Repeating DTMF tones are not detected correctly when played too fast

[bert2]

When a DTMF tone is repeatedly played in short intervals, the DTMF detector will sometimes fail to tell them apart and report them as a single DTMF tone occurence instead.

Repro Steps

• Run integration test AudioFileTests.ShouldDetectVeryShortDtmfTonesCorrectly()

Repro Steps (Alternative)

• Execute DtmfDetector
• Press O to start capturing the current audio output
• Play https://en.wikipedia.org/wiki/File:DTMF_dialing.ogg and compare detected tones with the ones specified

Note

This could be an issue with the test data. The tones might be played faster than the typical Mark/Space of 40/40, which the detector assumes as minimum.

[bert2]

Issue has been fixed.