Audio quality of Bluetooth music receiver TS-BTAD01

Results of objective Df measurements with real music material.
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Objective difference measurements to predict listening test results?

Auditory perception of waveform degradation.
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Audio quality of iPhone 6

New beginning of testing portable media players.
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Opus at high bitrates (128-192-256 kbit/s)

It looks like Opus audio format becomes popular. During last month SE received several requests to add it to the rating system. Low bitrate settings (--bitrate 59-90-96) were in the system since the first public release of the codec. Now high bitrates (--bitrate 128-192-256) are added as well. In contrast to other VBR encoders Opus uses “non-standard” bit allocation strategy for...
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Diffrogram: visualization of signal differences in audio research

Method, accuracy and applications.
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