Talk:TimeStretch - Revision history

Admin: /* default values of the advanced parameters */

2016-07-07T21:42:59Z

‎default values of the advanced parameters

Admin: /* default values of the advanced parameters */

2016-07-07T21:42:24Z

‎default values of the advanced parameters

Admin: explanation default values of advanced parameters

2016-07-07T21:38:47Z

explanation default values of advanced parameters

Raffriff42: rewrite reply

2016-02-19T11:18:07Z

rewrite reply

Raffriff42: confused

2016-02-19T11:07:35Z

confused

Raffriff42: backtrack

2016-02-19T04:01:12Z

backtrack

Raffriff42: reply

2016-02-19T03:36:59Z

Reel.Deal: one more thing

2016-02-17T02:17:06Z

one more thing

Reel.Deal: add a bit more

2016-02-17T02:08:52Z

add a bit more

Reel.Deal: reply

2016-02-17T01:42:50Z

@@ Line 39: / Line 39: @@
   // 'overlapMS' = overlapping length (default = 12 ms)
-I found out that this comment is wrong after a lot of debugging (perhaps it was correct in an older verion of SoundTouch?):
+I found out that this comment is wrong after a lot of debugging (perhaps it was correct in an older verion of SoundTouch?).
 * aa = 64 is set in RateTransposer.cpp (the value doesn't change unless you use the advanced parameter to change it):

@@ Line 39: / Line 39: @@
   // 'overlapMS' = overlapping length (default = 12 ms)
-I found out that this comment is wrong after a lot of debugging:
+I found out that this comment is wrong after a lot of debugging (perhaps it was correct in an older verion of SoundTouch?):
 * aa = 64 is set in RateTransposer.cpp (the value doesn't change unless you use the advanced parameter to change it):

← Older revision		Revision as of 21:38, 7 July 2016
Line 26:		Line 26:
	:"The changes in TimeStretchPlugin will be included in TimeStretch in AviSynth 2.6.1"		:"The changes in TimeStretchPlugin will be included in TimeStretch in AviSynth 2.6.1"
	:Thanks, Reel.Deal. I've done what I can with the page for the time being. Still TODO: determine default parameters. --[[User:Raffriff42\|Raffriff42]] 12:18, 19 February 2016 (CET)		:Thanks, Reel.Deal. I've done what I can with the page for the time being. Still TODO: determine default parameters. --[[User:Raffriff42\|Raffriff42]] 12:18, 19 February 2016 (CET)
		+
		+	=== default values of the advanced parameters ===
		+
		+	I think the default values that are mentioned in the history, come from this comment in the source of SoundTouch:
		+
		+	TDStretch.cpp:
		+	// Sets routine control parameters. These control are certain time constants
		+	// defining how the sound is stretched to the desired duration.
		+	//
		+	// 'sequenceMS' = one processing sequence length in milliseconds (default = 82 ms)
		+	// 'seekwindowMS' = seeking window length for scanning the best overlapping position (default = 28 ms)
		+	// 'overlapMS' = overlapping length (default = 12 ms)
		+
		+	I found out that this comment is wrong after a lot of debugging:
		+
		+	* aa = 64 is set in RateTransposer.cpp (the value doesn't change unless you use the advanced parameter to change it):
		+	// Constructor
		+	RateTransposer::RateTransposer() : FIFOProcessor(&outputBuffer)
		+	{
		+	bUseAAFilter = true;
		+
		+	// Instantiates the anti-alias filter
		+	pAAFilter = new AAFilter(64);
		+	pTransposer = TransposerBase::newInstance();
		+	}
		+
		+	* overlap is set in TDStretch.h (the value doesn't change unless you use the advanced parameter to change it):
		+	TDStretch.h:
		+	#define DEFAULT_OVERLAP_MS 8
		+
		+	* sequence and seekwindow are set in TDStretch.cpp:
		+	/// Calculates processing sequence length according to tempo setting
		+	void TDStretch::calcSeqParameters()
		+	{
		+	// Adjust tempo param according to tempo, so that variating processing sequence length is used
		+	// at varius tempo settings, between the given low...top limits
		+	(...)
		+
		+	if (bAutoSeqSetting)
		+	{
		+	seq = AUTOSEQ_C + AUTOSEQ_K * tempo;
		+	seq = CHECK_LIMITS(seq, AUTOSEQ_AT_MAX, AUTOSEQ_AT_MIN);
		+	sequenceMs = (int)(seq + 0.5);
		+	}
		+
		+	if (bAutoSeekSetting)
		+	{
		+	seek = AUTOSEEK_C + AUTOSEEK_K * tempo;
		+	seek = CHECK_LIMITS(seek, AUTOSEEK_AT_MAX, AUTOSEEK_AT_MIN);
		+	seekWindowMs = (int)(seek + 0.5);
		+	}
		+
		+	(...)
		+	}
		+
		+	The default values are set when the code executes:
		+	sampler = new SoundTouch();
		+
		+	The default values are updated when the code executes:
		+	sampler->setTempo(_tempo);
		+	sampler->setPitch(_pitch);
		+
		+	[[User:Admin\|Admin]] 23:38, 7 July 2016 (CEST) Wilbert

@@ Line 24: / Line 24: @@
 The latest SoundTouch is v1.9.2 released on Sept. 2015, do you plan on updating the plugin to reflect that? Also a good idea to use the latest in AviSynth 2.6.1. [[User:Reel.Deal|Reel.Deal]] 03:08, 17 February 2016 (CET)
-:Thanks Reel.Deal. I've done what I can for the time being. I'm still not clear about question #6. Is "2.61" an upcoming AviSynth release?
+:"The changes in TimeStretchPlugin will be included in TimeStretch in AviSynth 2.6.1"
-:Should the text therefore read "''In AviSynth version 2.61, an updated SoundTouch library '''''will be''''' ''used''..." ? --[[User:Raffriff42|Raffriff42]] 04:36, 19 February 2016 (CET)
+:Thanks, Reel.Deal. I've done what I can with the page for the time being. Still TODO: determine default parameters. --[[User:Raffriff42|Raffriff42]] 12:18, 19 February 2016 (CET)
-:... whoops, overlooked the [[TimeStretch#Changelog|Changelog]], where "2.61" ''seems'' to refer to '''TimeStretch'''. Will update the page. --[[User:Raffriff42|Raffriff42]] 05:01, 19 February 2016 (CET)
-:... unless [[TimeStretch#Changelog|Changelog]] is referring to an AviSynth release, like all other internal changelogs? --[[User:Raffriff42|Raffriff42]] 12:07, 19 February 2016 (CET)

@@ Line 26: / Line 26: @@
 :Thanks Reel.Deal. I've done what I can for the time being. I'm still not clear about question #6. Is "2.61" an upcoming AviSynth release?
 :Should the text therefore read "''In AviSynth version 2.61, an updated SoundTouch library '''''will be''''' ''used''..." ? --[[User:Raffriff42|Raffriff42]] 04:36, 19 February 2016 (CET)
-:... whoops, overlooked the [[TimeStretch#Changelog|Changelog]], "2.61" refers to '''TimeStretch'''. Will update the page. --[[User:Raffriff42|Raffriff42]] 05:01, 19 February 2016 (CET)
+:... whoops, overlooked the [[TimeStretch#Changelog|Changelog]], where "2.61" ''seems'' to refer to '''TimeStretch'''. Will update the page. --[[User:Raffriff42|Raffriff42]] 05:01, 19 February 2016 (CET)

← Older revision		Revision as of 04:01, 19 February 2016
Line 26:		Line 26:
	:Thanks Reel.Deal. I've done what I can for the time being. I'm still not clear about question #6. Is "2.61" an upcoming AviSynth release?		:Thanks Reel.Deal. I've done what I can for the time being. I'm still not clear about question #6. Is "2.61" an upcoming AviSynth release?
	:Should the text therefore read "''In AviSynth version 2.61, an updated SoundTouch library '''''will be''''' ''used''..." ? --[[User:Raffriff42\|Raffriff42]] 04:36, 19 February 2016 (CET)		:Should the text therefore read "''In AviSynth version 2.61, an updated SoundTouch library '''''will be''''' ''used''..." ? --[[User:Raffriff42\|Raffriff42]] 04:36, 19 February 2016 (CET)
		+	:... whoops, overlooked the [[TimeStretch#Changelog\|Changelog]], "2.61" refers to '''TimeStretch'''. Will update the page. --[[User:Raffriff42\|Raffriff42]] 05:01, 19 February 2016 (CET)

← Older revision		Revision as of 03:36, 19 February 2016
Line 23:		Line 23:
	'''@Wilbert'''<br/>		'''@Wilbert'''<br/>
	The latest SoundTouch is v1.9.2 released on Sept. 2015, do you plan on updating the plugin to reflect that? Also a good idea to use the latest in AviSynth 2.6.1. [[User:Reel.Deal\|Reel.Deal]] 03:08, 17 February 2016 (CET)		The latest SoundTouch is v1.9.2 released on Sept. 2015, do you plan on updating the plugin to reflect that? Also a good idea to use the latest in AviSynth 2.6.1. [[User:Reel.Deal\|Reel.Deal]] 03:08, 17 February 2016 (CET)
		+
		+	:Thanks Reel.Deal. I've done what I can for the time being. I'm still not clear about question #6. Is "2.61" an upcoming AviSynth release?
		+	:Should the text therefore read "''In AviSynth version 2.61, an updated SoundTouch library '''''will be''''' ''used''..." ? --[[User:Raffriff42\|Raffriff42]] 04:36, 19 February 2016 (CET)

@@ Line 15: / Line 15: @@
 # The changes in TimeStretchPlugin will be included in TimeStretch in AviSynth 2.6.1[http://forum.doom9.org/showthread.php?t=172054#post1718302]. So until then it's probably best to use the plugin since it uses an updated SoundTouch library (v1.8.0) and has multichannel support[http://forum.doom9.org/showthread.php?t=171804#post1722472].
-# Looking at <tt>SoundTouch.cpp</tt> it seems AviSynth is currently using the SoundTouch library from 2006 (v1.13). The plugin uses the latest library so there may or may not be some differences in the quality. Have not checked.
+# Looking at <tt>SoundTouch.cpp</tt> it seems AviSynth is currently using the SoundTouch library from 2006 (v1.13). The plugin uses the latest library so <strike>there may or may not be some differences in the quality. Have not checked.</strike> Just took a look at the SoundTouch changelog and there's definitely been some changes that improve quality since v1.13.
 #Wilbert said this: ''"If you don't supply these values, i guess the library sets default values. But i don't know what these default values are or where exactly they are set. Will check later."''[http://forum.doom9.org/showthread.php?t=171804&page=2#post1732120]. There's also some information in the SouchTouch readme (3.4 Tuning the algorithm parameters): ''The time-stretch algorithm default parameter values are set by the following #defines in file "TDStretch.h"''[http://web.archive.org/web/20151121140714/http://www.surina.net/soundtouch/README.html]
 #SoundTouch read me (3.5 Performance Optimizations): ''The time-stretch routine has a 'quick' mode that substantially speeds up the algorithm but may slightly compromise the sound quality. This mode is activated by calling SoundTouch::setSetting() function with parameter  id of SETTING_USE_QUICKSEEK and value "1"''[http://web.archive.org/web/20151121140714/http://www.surina.net/soundtouch/README.html]

← Older revision		Revision as of 01:42, 17 February 2016
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	Thanks and cheers,<br>		Thanks and cheers,<br>
	--[[User:Raffriff42\|Raffriff42]] 23:07, 16 February 2016 (CET)		--[[User:Raffriff42\|Raffriff42]] 23:07, 16 February 2016 (CET)
		+
		+
		+	=====Possible answers=====
		+
		+	# The changes in TimeStretchPlugin will be included in TimeStretch in AviSynth 2.6.1[http://forum.doom9.org/showthread.php?t=172054#post1718302]. So until then it's probably best to use the plugin since it uses an updated SoundTouch library (v1.8.0) and has multichannel support[http://forum.doom9.org/showthread.php?t=171804#post1722472].
		+	# Looking at <tt>SoundTouch.cpp</tt> it seems AviSynth is currently using the SoundTouch library from 2006 (v1.13). The plugin uses the latest library so there may or may not be some differences in the quality. Have not checked.
		+	#Wilbert said this: ''"If you don't supply these values, i guess the library sets default values. But i don't know what these default values are or where exactly they are set. Will check later."''[http://forum.doom9.org/showthread.php?t=171804&page=2#post1732120]
		+
		+	Hope it helps. [[User:Reel.Deal\|Reel.Deal]] 02:42, 17 February 2016 (CET)