Bug#864262: unblock: espeak-ng/1.49.0+dfsg-11

[Cyril Brulebois]

Hi,

Samuel Thibault  (2017-06-05):
> espeak-ng used to have overlapping speech synthesis issues (#848016):
> e.g. while moving fast in a list of items, the speech of each item would
> get mixed with the previous one, making it difficult or impossible to
> hear. We reduced the buffer size of espeak-ng from 200ms to 50ms to
> considerably reduce the issue.
> 
> However, the modified buffer size happened to break the use of mbrola
> voices (#860891), so we raised it a bit, from 50ms to 60ms, like
> upstream did, to fix that.
> 
> However, that brought back some of the overlapping issues, making it
> tedious to use...
> (https://lists.debian.org/debian-accessibility/2017/06/msg2.html)
> 
> I have thus uploaded a version -11 of espeak-ng (attached debdiff) which
> reduces it to 49ms, which avoids the overlapping regression, and which I
> have tested as working with all mbrola voices.
> 
> unblock espeak-ng/1.49.0+dfsg-11
> 
> This contains udebs, so Cc-ing KiBi for the udeb ack.

No objections, feel free to unblock & urgent ASAP.


KiBi.


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Bug#864262: unblock: espeak-ng/1.49.0+dfsg-11

[Samuel Thibault]

Package: release.debian.org
Severity: normal
User: release.debian@packages.debian.org
Usertags: unblock

Hello,

espeak-ng used to have overlapping speech synthesis issues (#848016):
e.g. while moving fast in a list of items, the speech of each item would
get mixed with the previous one, making it difficult or impossible to
hear. We reduced the buffer size of espeak-ng from 200ms to 50ms to
considerably reduce the issue.

However, the modified buffer size happened to break the use of mbrola
voices (#860891), so we raised it a bit, from 50ms to 60ms, like
upstream did, to fix that.

However, that brought back some of the overlapping issues, making it
tedious to use...
(https://lists.debian.org/debian-accessibility/2017/06/msg2.html)

I have thus uploaded a version -11 of espeak-ng (attached debdiff) which
reduces it to 49ms, which avoids the overlapping regression, and which I
have tested as working with all mbrola voices.

unblock espeak-ng/1.49.0+dfsg-11

This contains udebs, so Cc-ing KiBi for the udeb ack.

-- System Information:
Debian Release: 9.0
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable-debug'), (500, 
'testing-debug'), (500, 'buildd-unstable'), (500, 'unstable'), (500, 'stable'), 
(500, 'oldstable'), (1, 'experimental-debug'), (1, 'buildd-experimental'), (1, 
'experimental')
Architecture: amd64
 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.11.0 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

-- 
Samuel
 ya(ka|ma|to)* ca existe une fois sur 2 au japon, c'est facile ;-)
 -+- #ens-mim au japon -+-
diff -Nru espeak-ng-1.49.0+dfsg/debian/changelog 
espeak-ng-1.49.0+dfsg/debian/changelog
--- espeak-ng-1.49.0+dfsg/debian/changelog  2017-04-29 16:32:54.0 
+0200
+++ espeak-ng-1.49.0+dfsg/debian/changelog  2017-06-05 22:04:57.0 
+0200
@@ -1,3 +1,11 @@
+espeak-ng (1.49.0+dfsg-11) unstable; urgency=medium
+
+  * patches/bufsize: Increasing the buffersize to 60ms brought back some
+overlapping. Revert this to 49ms, which both avoids overlapping, and
+was tested to work fine with all MBROLA voices.
+
+ -- Samuel Thibault   Mon, 05 Jun 2017 22:04:57 +0200
+
 espeak-ng (1.49.0+dfsg-10) unstable; urgency=medium
 
   * patches/bufsize: Increase buffersize to 60ms like upstream did, to fix 
using
diff -Nru espeak-ng-1.49.0+dfsg/debian/patches/bufsize 
espeak-ng-1.49.0+dfsg/debian/patches/bufsize
--- espeak-ng-1.49.0+dfsg/debian/patches/bufsize2017-04-29 
16:32:54.0 +0200
+++ espeak-ng-1.49.0+dfsg/debian/patches/bufsize2017-06-05 
22:04:57.0 +0200
@@ -5,7 +5,7 @@
// buflength is in mS, allocate 2 bytes per sample
if ((buffer_length == 0) || (output_mode & ENOUTPUT_MODE_SPEAK_AUDIO))
 -  buffer_length = 200;
-+  buffer_length = 60;
++  buffer_length = 49;
  
outbuf_size = (buffer_length * samplerate)/500;
out_start = (unsigned char *)realloc(outbuf, outbuf_size);