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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
Lunetta Beautifier
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Inventor
Stream Operator


Joined: Oct 13, 2007
Posts: 5978
Location: San Antonio, Tx, USA
Audio files: 258

PostPosted: Sun Sep 04, 2011 8:45 am    Post subject: Lunetta Beautifier
Subject description: ChucK post-processor for Lunettas
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I made a ChucK program that removes the harsh square wave sounds from Lunetta audio outputs, or minimizes them anyway. Listen to the attached audio sample, first there is a Lunetta sequence then a brief pause and the same sequence processed by the ChucK program.

It sounds a bit bubbly and sine wavy, which is OK I guess. Some people prefer the natural digital sounds, but I kind of like the processed one better. Of course there are many ways to do such "beautification", and maybe I'll have another try at it based on comments posted here.

The algorithm is simple: take an fft, find the strongest harmonic, attenuate neighboring harmonics by exponentially increasing amounts according to their distance from the strongest harmonic, then take an ifft to get the final audio.

ta-da! beautification. Enjoy!

Les


Lunetta Beautifier.ck
 Description:
the chuck file

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 Filename:  Lunetta Beautifier.ck
 Filesize:  596 Bytes
 Downloaded:  102 Time(s)


Lunetta Beautifier.mp3
 Description:
the audio sample

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 Filename:  Lunetta Beautifier.mp3
 Filesize:  526.23 KB
 Downloaded:  268 Time(s)


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Sonic



Joined: Dec 02, 2010
Posts: 84
Location: Toronto

PostPosted: Sun Sep 04, 2011 10:11 am    Post subject: Reply with quote  Mark this post and the followings unread

Nice. I like the audio both with and without the beautifier. Do you plan to build a hardware version?
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Inventor
Stream Operator


Joined: Oct 13, 2007
Posts: 5978
Location: San Antonio, Tx, USA
Audio files: 258

PostPosted: Sun Sep 04, 2011 11:33 am    Post subject: Reply with quote  Mark this post and the followings unread

A hardware version of this algorithm would be quite complex, and what little time I have spent trying to imagine another more implementable hardware version has not been fruitful. I will give it some more thought, because that would be a really nice thing to have - and you asked!

Les

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Cynosure
Site Admin


Joined: Dec 11, 2010
Posts: 692
Location: Toronto, Ontario - Canada
Audio files: 39

PostPosted: Thu Sep 08, 2011 5:08 pm    Post subject: Reply with quote  Mark this post and the followings unread

I would be interested in a hardware version too. Also, the demo seemed to either be on or off. Could it be applied with a pot like a filter? If not, then maybe I could just split the sound first, modify one of the splits, and then use a pot to mix them back together.
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Inventor
Stream Operator


Joined: Oct 13, 2007
Posts: 5978
Location: San Antonio, Tx, USA
Audio files: 258

PostPosted: Fri Sep 09, 2011 12:45 pm    Post subject: Reply with quote  Mark this post and the followings unread

Cyno, yes there are a couple of parameters that can be varied like a potentiometer. I'll pull them to the top and name them as variables if I get time.

Les

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