[Freeswitch-users] TTS Related (Freeswitch, Asterisk, Solaris)

[Christopher Rienzo]

I'm using MRCPv1, so I wrote a dialplan app to pick MRCP profiles
round-robin.  It also keeps track of failures so I can back off if a server
is down.  Unfortunately, I'm not allowed to share the app. If you use
MRCPv2, you could probably just use a SIP load balancer to do the same.

MRCP is a good choice for me because I have a small pool of MRCP servers +
licenses serving a large number of telephony servers.  It's also nice
because even though the TTS libraries have to run on 32-bit CentOS, I can
still run FreeSWITCH on 64-bit CentOS 5.

mod_unimrcp is stable now- I use it in production to handle thousands of TTS
requests each day and haven't had a crash in months.  Its workload is
increasing as I continue add more traffic to our FS boxes.

The wiki has example configurations for 5 different MRCP servers.  You just
need to figure out if you can build mod_unimrcp on solaris and then pick a
TTS solution.

The relevant pages are:

http://wiki.freeswitch.org/wiki/Mod_unimrcp
http://www.unimrcp.org

FYI- mod_unimrcp has been ported to asterisk as app_unimrcp and is available
at www.unimrcp.org.  Both platforms have almost identical open-source MRCP
capability.

On Thu, Nov 11, 2010 at 11:18 PM, RR <ranjtech at gmail.com> wrote:

> Hi Christopher,
>
> been thinking about this for a little bit and was wondering if instead of
> going on a chase around the net to find how to do this, would you be able to
> share details of how you have your TTS / MRCP Cluster setup? Is this in the
> Wiki somewhere or did you figure this out on your own? How well does this
> perform? I'm assuming if I can manage to compile FS or Asterisk (depending
> on which one I go with) on Solaris 10, then I could not worry about TTS
> compiling on Solaris as I can just build my MRCP cluster like yours on
> Linux/Windows etc and just do what you're doing?
>
> Any help would be HIGHLY HIGHLY appreciated.
>
> Thank you in advance
> RR
>
> On Thu, Nov 11, 2010 at 8:57 AM, Christopher Rienzo <cmrienzo at gmail.com>wrote:
>
>> I can't answer about FreeSWITCH on solaris, but I can talk about TTS.  In
>> my setup, I have a cluster of MRCP servers.  The FreeSWITCH boxes then use
>> mod_unimrcp to make TTS requests to that cluster.  This has the following
>> benefits:
>>
>> 1. TTS licenses can be shared among any FreeSWITCH box.   This is good
>> because licenses are expensive.
>> 2. There are more TTS vendors that support MRCP than there are TTS modules
>> in FreeSWITCH- though a new module could be written if you are a C
>> developer.
>>
>> Others use mod_cepstral and mod_tts_commandline, so those options can be
>> explored too.
>>
>>
>>
>> On Thu, Nov 11, 2010 at 6:32 AM, RR <ranjtech at gmail.com> wrote:
>>
>>> Hello All,
>>>
>>> I have a whole bunch of questions regarding the TTS functionality in
>>> FreeSWITCH and Just Generally about Freeswitch on a Sparc based Solaris
>>> Platform and then the combo of the two, whether FreeSWITCH can be built on a
>>> Sparc based Solaris platform when compiled with a "reasonably" good TTS
>>> module be it Cepstral, FLite OR NeoSpeech etc?
>>>
>>> 1) Can anyone reflect on any experience they might have had in terms of
>>> the performance difference between TTS on Asterisk (let's say Asterisk 1.8)
>>> and FreeSWITCH? Is one better than the other?
>>> 2) Can One or the other or both be compiled successfully on a Sparc based
>>> Solaris platform?
>>> 3) Would it benefit if I was to use a dedicated box for TTS and throw
>>> calls to that box for TTS processing and send back media the way it came
>>> after the sound files are generated from the TTS-process?
>>> 4) Please note that the quality of the Translation doesn't need to be
>>> impeccable or mimic human speech. It just needs to be understandable enough
>>> esp. over mobile phones. The more complex part about it is, that the user
>>> directory can/will have names from all sorts of ethnicities/nationalities
>>> which may mess up a lot of these TTS engines. So what is the best approach
>>> there in this mixed environment
>>> 5) Does the OpenMRCP play any part in any of this? Would I benefit with
>>> that?
>>>
>>> I think this is the crux of my concerns. Any ideas and/or suggestions to
>>> kick off the discussion would be very very much appreciated.
>>>
>>> Kind Regards,
>>> RR
>>>
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>>>
>>
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