Visual voice pitch tracking app

I need visual voice pitch tracking and recording app.

This is for evaluation purpose, i need just working prototype

App should do at the same time:

- play mp3/wav (from memory stream io)

- scroll smoothly long-wide image

- track accurate pitch (need to select one of existing free libs or ready to use code)

- draw pitch on that image (draw always at static position on screen)

- record into memory stream object in wav format, adjust delay to be synced with playable file

There are many ready to use pitch tracking libs, need to research which of them can do realtime accurate pitch detection.

It should allow make a loop of range (in float seconds) with auto restart (clear generated image, clear recorded io stream, then pause for defined amount of seconds (float), and start from loop starting position). Stop by button, recorded stream should store only last try from loop start. If the loop range fit into screen - no scroll, just move pitch pointer over screen.

Scrolling and pitch tracking should look like in vocaberry app on android/ios

After playing/recording it should:

- allow to scroll by mouse/touchpad generated image (original + tracking)

- save wav file

- restart again

In future or if budget will allow to do in that project:

- after recording it should allow to playback mixed source mp3 with recorded one. at least hould be taken into account while developing code now.

- it should allow to playback while recording 2 mixed mp3/wav with different volume at the same time.


- use asio for play and recording, settings should be configured (for now just defined constants is fine 24bit, 48khz, read at once samples count should be read from asio device default/current settings).

- use python+qt or c, c++, delphi, not c#

- scrolling of image should be smooth, so need to use gl or directx or something

- scrollable image should be synced with samples count played (not timer)

- all should not be much cpu intensive

- definable volume level under which it will not track pitch (no draw on image)

Image will have header and footer size (definable), inner part splitted equally to definable notes range (frequency ranges). Notes specified as [CDEFGAB][1-6][#]. So with image will be image definition file with parameters:

- notes range, example e1-a2

- header size

- footer size

For debugging purpose asio4all may be used. You will need any cheap microphone connected to your sound card, web cam mic is fine.

Also before starting please try vocaberry to understand how it should work.

I need more precise tracking and minimized delay as much as possible. Also sometimes vocaberry mistakes for octave for few milliseconds, so need to somehow workaround this issue (sometimes frequency peak +-1 octave have more power for small amount of time).

In future in case of success (it will be tested on some sample of peoples) i need to port it to linux (jackd+qt/gl), so code should be ready to port, no need to do cross-platform for now, but better if it will use qt or gl

I will pay only after project is fully done and tested by me.

Skills: C++ Programming, Objective C, Python, OpenGL, Qt

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About the Employer:
( 0 reviews ) Kirov, Russian Federation

Project ID: #30540969

8 freelancers are bidding on average $1290 for this job

(17 Reviews)

Having 10 years of experience in Qt, C++,PyQt5,PySide2 and SQL on Linux, windows, mac and arm boards. we can discuss more information in chat. i will develop application using Qt.

$500 USD in 5 days
(53 Reviews)

Hello, I'm a C/C++ developer and to achieve what you need, some hardware acceleration would be needed. Qt or QML would be perfect for this, it would allow for smooth scrolling and it is cross-platform too. Portaudio (w More

$550 USD in 10 days
(12 Reviews)

Hi, I've read your description carefully. I have more than 5 years experience with C/C++/Qt/OpenGL/Python. **************************************************************** I'm confident in your project with high quali More

$250 USD in 5 days
(4 Reviews)

Hi Client. I have skills like C, C++, C# and I am an expert for it. I would like to work with your project in full time and also can make your project perfectly. Please contact with me and discuss with your project.

$300 USD in 3 days
(5 Reviews)

- previous experience in such topics; - eager to discuss a lot in this chat stream; - degree stats / maths;

$445 USD in 2 days
(3 Reviews)

hello dear client,gone through your requirements for application development we are experienced web and application development freelancer team kindly inbox me for project discussion. thanks

$278 USD in 7 days
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Hi there, Hope you are doing great. We are a team of highly expert developers and designers. We have rich experience in providing high-quality IT solutions to more than 2500 happy and satisfied clients around the glob More

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