Re: Emacspeak with voxin / alsa buffer underruns.
- From: Dave <davidct1209@xxxxxxxxx>
- To: programmingblind@xxxxxxxxxxxxx
- Date: Thu, 28 Oct 2010 08:37:53 -0700
fyi, I resolved this issue by recompiling the speech server and
tinkering with the buffer time. I made direct edits to atcleci.cpp
which sets low-level hardware parameters using the alsa pcm interface.
By decreasing the buffer time, size, and period size, the hardware
seems to check the ring buffer more frequently so not as many
utterances are lost and are flushed more often.
On 10/27/10, Alex Midence <alex.midence@xxxxxxxxx> wrote:
> I ran into a similar issue but with espeak. Navigating by character
> causes the speech to cut off mid syllable resulting in a very
> frustrating experience. I get a similar problem when navigating by
> individual words. position is read pozzy, future is read fewch and so
> forth. This then is transmitted when you read letter by letter. I
> suspect that with you, it's just cutting the entire word out
> altogether.
>
>
>
> On 10/28/10, Dave <davidct1209@xxxxxxxxx> wrote:
>> Hey list,
>>
>> Curious if anyone has run into this issue. I'm getting silence when
>> attempting to navigate by character in emacspeak using the
>> linux-outloud speech server. This only occurs for specific characters
>> and more frustratingly only reproduces when navigating in a specific
>> direction.
>>
>> I'm guessing the bug lies somewhere within the server implementation
>> when coupled with my sound hardware and based on the fact that I'm
>> using VMWare Player. I suspect there's a buffer underrun occurring
>> from reading the PCM interface documentation. But, I've not touched
>> low-level audio libraries to any extent. I could fiddle with some of
>> the hw param settings (buffer size/time, etc.), but it looks
>> non-trivial since alsa has a complex n-dimensional configuration space
>> which restricts the available setting based on hardware.
>>
>> Anyone have any ideas/suggestions?
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