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* More work on framing, interpolation and scaling for longer window than FFT size.

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This adds the --smoothing option to the command line tool and SmoothingOn/Off
  options to the API, introducing a double-length window with presum FFT and
  time-domain smoothing.  Behaviour elsewhere _should_ be unchanged.
This commit is contained in:
Chris Cannam
2010-05-29 22:07:54 +01:00
parent 49cf25d724
commit 99ba629361
10 changed files with 190 additions and 128 deletions
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18
rubberband/RubberBandStretcher.h
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@@ -191,7 +191,18 @@ public:
* likely to result in a smoother sound at the expense of
* clarity and timing.
*
* 8. Flags prefixed \c OptionFormant control the handling of
* 8. Flags prefixed \c OptionSmoothing control the use of
* window-presum FFT and time-domain smoothing. These options may
* not be changed after construction.
*
* \li \c OptionSmoothingOff - Do not use time-domain smoothing.
*
* \li \c OptionSmoothingOn - Use time-domain smoothing.
* This will result in a softer sound, but it may be
* appropriate for longer stretches of some instruments and
* can mix well with OptionWindowShort.
*
* 9. Flags prefixed \c OptionFormant control the handling of
* formant shape (spectral envelope) when pitch-shifting. These
* options may be changed at any time.
*
@@ -204,7 +215,7 @@ public:
* note frequency without so substantially affecting the
* perceived pitch profile of the voice or instrument.
*
* 9. Flags prefixed \c OptionPitch control the method used for
* 10. Flags prefixed \c OptionPitch control the method used for
* pitch shifting. These options may be changed at any time.
* They are only effective in realtime mode; in offline mode, the
* pitch-shift method is fixed.
@@ -253,6 +264,9 @@ public:
OptionWindowShort = 0x00100000,
OptionWindowLong = 0x00200000,
OptionSmoothingOff = 0x00000000,
OptionSmoothingOn = 0x00800000,
OptionFormantShifted = 0x00000000,
OptionFormantPreserved = 0x01000000,