Re: ViaVoice outloud on 64bit Ubuntu

["Tim Cross" <tcross@xxxxxxxxxxx>]

Hi Raman,

I will experiment with past revisions and try to identify the 'best' version. 

Note that I've been using the 'previous' version (previous to recent changes)
for quite some time under pulseaudio with no significant problems apart from
outloud segfaulting a few times a day. For me, the responsiveness was only a
little less snappy than it is with the recent updates and did not suffer from
the repeated utterance artifact issue. The main potential advantage of the
recent changes was that it appeared to make the server more stable. 

Bart, I believe that if you add a .asoundrc to your home directory, outloud
will use native alsa and not use pulseaudio. However, you will run into device
contention if you have another device trying to access the sound hardware, so
make sure all other sound apps are stopped. 

I will post the output from the 'good' version in case that can help with
diagnostics etc. However, I may not have access to do this until Monday. 

Tim

T. V. Raman writes:
 > 
 > On the plus side, I can now produce the problem on my home
 > machine if I tweak my .asoundrc -- so there is card-specific
 > asoundrc complexity biting again.
 > 
 > An interesting test to try is to ask mplayer to play .flv files
 > using -vo null -- and see if the audio stutters --- if it does,
 > then you also see the buffer underrun and consequently the
 > artifacts Bart and Tim have seen.
 > 
 > I'm almost tempted to roll back  all the way back to last week at
 > this point. 
 > 
 > Bart/Tim, since yyyyou initially said things got better for you,
 > let me know the checkin that that corresponded to -- for no wI'll
 > go to 7548.
 > ---
 > 
 > 
 > >>>>> "tvr" == T V Raman <tv.raman.tv@xxxxxxxxxxx> writes:
 >     tvr> Could you try with pulseaudio out of the picture? I'm
 >     tvr> not using pulse on any o fmy machines, and am not seeing
 >     tvr> breakage with char echo --- also, each commit Imade was
 >     tvr> working fully on my machines when I committed them.
 >     tvr> 
 >     >>>>>> "Bart" == Bart Bunting <bart@xxxxxxxxxxx> writes:
 >     Bart> Hi, Rev 7548 is the last good commit. After this the
 >     Bart> artifacts are still there but character echo is almost
 >     Bart> toatlly broken.
 >     Bart> 
 >     Bart> Here is the output when starting the outloud script:
 >     Bart> 
 >     Bart> bart@xxxxxxxxxxx:~/emacs/lisp/emacspeak/servers$ ./outloud ALSA
 >     Bart> <-> PulseAudio PCM I/O Plugin Its setup is: stream :
 >     Bart> PLAYBACK access : RW_INTERLEAVED format : S16_LE
 >     Bart> subformat : STD channels : 1 rate : 11025 exact rate :
 >     Bart> 11025 (11025/1) msbits : 16 buffer_size : 5513
 >     Bart> period_size : 1378 period_time : 125000 tstamp_mode :
 >     Bart> NONE period_step : 1 avail_min : 1378 period_event : 0
 >     Bart> start_threshold : 5513 stop_threshold : 5513
 >     Bart> silence_threshold: 0 silence_size : 0 boundary :
 >     Bart> 1445199872 allocating 2756 samples output buffered to
 >     Bart> waveBuffer with size 2756 ALSA <-> PulseAudio PCM I/O
 >     Bart> Plugin Its setup is: stream : PLAYBACK access :
 >     Bart> RW_INTERLEAVED format : S16_LE subformat : STD channels
 >     Bart> : 1 rate : 11025 exact rate : 11025 (11025/1) msbits :
 >     Bart> 16 buffer_size : 5513 period_size : 1378 period_time :
 >     Bart> 125000 tstamp_mode : NONE period_step : 1 avail_min :
 >     Bart> 1378 period_event : 0 start_threshold : 5513
 >     Bart> stop_threshold : 5513 silence_threshold: 0 silence_size
 >     Bart> : 0 boundary : 1445199872 %
 >     Bart> 
 >     Bart> On Wed, 7 Mar 2012 18:08:32 -0800, "T. V. Raman"
 >     Bart> <tv.raman.tv@xxxxxxxxxxx> wrote:
 >     >>> Tim and Bart,
 >     >>> 
 >     >>> That is indeed strange --- am still not able to reproduce
 >     >>> the issues.
 >     >>> 
 >     >>> I did one more clean up pass -- do an svn update and try
 >     >>> again.
 >     >>> 
 >     >>> If the problems persist, run the tcl script at the shell,
 >     >>> and send me the device configuration it outputs.
 >     >>> 
 >     >>> I'm typing this on my laptop with outloud doing the
 >     >>> talking, and I dont have character echo going away -- nor
 >     >>> do I see the stutter Bart mentioned when using voice-lock
 >     >>> -- 
 >     >>> 
 >     >>> -- 
 >     >>> 
 >     >>> -- 
 >     tvr> 
 >     tvr> -- Best Regards, --raman
 > 
 > -- 
 > Best Regards,
 > --raman
 > 
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-- 
Tim Cross
Information Technology 
University of New England
 Phone: +61 2 6773 3210
Mobile: 0428 212217
   Fax: +61 2 6773 3424
E-Mail: tcross@xxxxxxxxxxx
   Web: http://www.une.edu.au/itd
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                                                           âAlbert Einstein






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