[Clam-devel] Re: asking for advice about a callgrind session (sms harmonizer)

[Xavier Amatriain]

Hernán Ordiales wrote:
> hi! I'm testing both with elvis demo voice at SMSTools and with mic input voice
>
> There are audible demos here: http://audiores.uint8.com.ar/blog/?p=124
>   
Sorry, I had not seen the demos in the post.

Ok, this is for me a known problem meaning that I have experienced this 
exact problem before. Unfortunately
this is all I remember now and I will have to dig in my memory. This is 
definitely not related with performance
issues, it is a bug somewhere in the process. Again, it reminds me of 
something I thought I fixed long time ago
but will have to check the logs (maybe something related with outputting 
non-valid fundamental frequency
values would create a similar artifact...). Do you have the same result 
when you do a Harmonizer, or a PitchShift
in SMSTools.
> Analysis and Synthesis configurations are default ones...
>
> I've also tried with CLAM_OPTIMIZATION=1 but sound quaility turns very poor...
>   
That is very strange, I am using this flag on a daily basis with no 
problems... on OSX though. We should put this
on the list of todos. Even if sound quality is very poor... how about 
performance. Does the performance gain
seem to be good enough that this might deserve some investigation?

Xavier