Re: [music-dsp] English as a second language - measuring voice similarity

2014-07-17 Thread Rohit Agarwal
Hi Danijel, I'm not sure I understand this whole system. I assume you want to build a software app that listens to speakers and analyzes characteristics of their voice to determine if their spoken sound quality is like natives. If this is what you're building, you will need a classifier for

Re: [music-dsp] Instant frequency recognition

2014-07-17 Thread Vadim Zavalishin
On 16-Jul-14 15:29, Olli Niemitalo wrote: Not sure if this is related, but there appears to be something called chromatic derivatives: http://www.cse.unsw.edu.au/~ignjat/diff/ Seems pretty much related and going further in the same direction (alright, I just briefly glanced at chromatic

Re: [music-dsp] English as a second language - measuring voice similarity

2014-07-17 Thread Bogac Topaktas
Searching for the phrase non-native speaker identification gives pointers to key resources. See the references section of: http://en.wikipedia.org/wiki/Non-native_speech_database It seems like what you need is a machine learning algorithm that compares the subjects speech with records on a

Re: [music-dsp] English as a second language - measuring voice similarity

2014-07-17 Thread Bogac Topaktas
On Thu, July 17, 2014 2:05 pm, Rohit Agarwal wrote: You will likely compare in feature domain and that depends on the kind of features you use. You need some heuristics for determining how close a given feature sequence is to a reference feature sequence pegged as native. You would use these

Re: [music-dsp] English as a second language - measuring voice similarity

2014-07-17 Thread Rohit Agarwal
I think you would analyze in feature space, where the features are intermediates in the speech recognizer that you got off the shelf, what are the patterns that you associate with the speech of  a small class of native speakers. This would be  one way to define native-ness. Then you would

Re: [music-dsp] scripted dynamics compression

2014-07-17 Thread robert bristow-johnson
On 7/16/14 2:05 PM, Theo Verelst wrote: robert bristow-johnson wrote: ... { x x - x0 -4b/(1-r) { f(x) = { x - b*(1 + (1-r)/(4b)*(x-x0))^2|x - x0| 4b/(1-r) { { x0 + r*(x-x0)

Re: [music-dsp] scripted dynamics compression

2014-07-17 Thread Reid Oda
Thanks for all the input, everyone. Just to follow up on the original question. In the end the compressor built into SoX satisfied my needs for scripted processing of audio signals. In particular, it was able to handle really fast attack times and remain surprisingly transparent. On Thu, Jul 17,

Re: [music-dsp] Instant frequency recognition

2014-07-17 Thread Ethan Duni
Sinc interpolation would be theoretically correct, but, remember, that this thread is not about strictily theoretically correct frequency recognition, but rather about some more intuitive version with the concept of instant frequency. What is instant frequency? I have to say that I find this

Re: [music-dsp] Instant frequency recognition

2014-07-17 Thread zhiguang e zhang
This post explains the concept instantaneous frequency well: (It is basically used to distinguish amplitude from phase) http://math.stackexchange.com/questions/85388/does-the-phrase-instantaneous-frequency-make-sense EZ On Jul 17, 2014, at 6:40 PM, Ethan Duni ethan.d...@gmail.com wrote: Sinc

Re: [music-dsp] Instant frequency recognition

2014-07-17 Thread Giulio Moro
I guess my point is that I'm struggling to think of an application where  such strong prior knowledge exists, and where we'd still need to estimate frequencies from data. One such application would be a CV to controls(Midi,OSC,whatever) converter. As virtually all the soundcard inputs are AC