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What Is Ringing Audio

Ringing audio is output response of audio device or DSP algorithm of software (firmware) to input impulse signal. This measurement intended for testing of audio gears to quality of playback of signal with sharp attack (piano, guitar, drums, etc.).

For sample rate converter  AuI ConverteR 48x44 we see graph "Comparing of SRC ringing":

Comparing of SRC ringing of sample rate converters

Graph 1 (click to enlarge)

Input test signal (1 sample with maximal amplitude) we can see here:

Input impulse for testing of ringing

Graph 2

Ideal output signal must same to input signal (Graph 2).

It is possible when audio device or algorithm have flat amplitude-frequency response from 0 to Infinity Hz.

But many algorihms (as example: sample rate conversion) use some filters.

For qualitative rejection of conversion artefacts and minimal loss of width of pass band filter must have more sharpen transition from pass band to reject band.

But filter with more sharpen transition have more amplitude (energy) of oscillations out of time (1 sample only) input impulse. The oscilations is ringing.

 

Resume: We must use optimal filter for decreasing of ringing (maximal save pass band and maximal sharpness of transition from pass to reject bands).

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AuI ConverteR 48x44

 
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Released new studio audio converter AuI ConverteR 48x44 v. 6.1 CD ripper, ISO, DFF, DSF, WAV, FLAC, AIFF, ALAC. Apllied input and ouput DSF (D1024) audio file support; non-English simbols in ISO file name issues (under Windows), other minor issues.

Released new studio audio converter AuI ConverteR 48x44 v. 6.0.3 CD ripper, ISO, DFF, DSF, WAV, FLAC, AIFF, ALAC. In the settings added option for extracting of stereo or multichannel track only. Fixed wrong reading of long album, performer, track names from CD database.

Released new studio audio converter AuI ConverteR 48x44 v. 6.0.2 CD ripper, ISO, DFF, DSF, WAV, FLAC, AIFF, ALAC. Added album artwork management, fixed CUE+multiple files issue, trimmed long file path/name for ISO extractor under Windows and several minor bugs.

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