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Hey Guys!

HOPEFULLY…just a quick one here!

When I create a perfect loop in my DAW and export the file into the Music Tab in FMOD Designer, There is an audible click/pop/tick upon the loops start/end. This occurs with and without setting the tempo sync in the segment properties.

Any help?

Cheers!

EDIT: This even occurs when going from any segment to another segment via a Segment Link (Looped or Not)

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I’ve been having those problems also. Let’s get some info first.

What format are you compressing the sound back to? what quality?

In my experience, MP3 gave me clicks and pops with the last two version of designer. There is good documentation of that in the manual (Page 153) called "Seamless Looping". Unfortunately, sometimes it isn’t seamless.

When I changed the back to PCM or ADPCM it solved my problems. I prefer to use something smaller, but AFAIK, there isn’t a solution on why MP3 doesn’t work well with how I’m using it. If there’s anyone out there that knows why MP3’s don’t work well, please let me know!

The good guys at Firelight also suggest that I use OGG Vorbis. I haven’t tested that so I’ll have to get back to you ….. sometime……!

Hope this helps.

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[quote="halfasemitone":2drtlqiv]I’ve been having those problems also. Let’s get some info first.

What format are you compressing the sound back to? what quality?

In my experience, MP3 gave me clicks and pops with the last two version of designer. There is good documentation of that in the manual (Page 153) called "Seamless Looping". Unfortunately, sometimes it isn’t seamless.

When I changed the back to PCM or ADPCM it solved my problems. I prefer to use something smaller, but AFAIK, there isn’t a solution on why MP3 doesn’t work well with how I’m using it. If there’s anyone out there that knows why MP3’s don’t work well, please let me know!

The good guys at Firelight also suggest that I use OGG Vorbis. I haven’t tested that so I’ll have to get back to you ….. sometime……!

Hope this helps.[/quote:2drtlqiv]

The reason the audio loop is popping is because when you convert a WAV file to MP3 it changes where the start and end line of the sound wave is. In a seamless WAV loop, it will start and end at the same place. But when you compress, it will slightly change where that line goes so that they do not match up anymore. It might also add a tiny bit of silence at the end too, which is never good. This mismatch creates the pop sound you hear.

I’ve tried compressing with Vorbis, and for some odd (but awesome) reason, it does not create a click / pop sound.

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MP3s have this artifact because the compressed audio is made up of frames. When the MP3 is encoded, if the last frame is not full, it is left with a short silence to fill it. Therefore, when looped, the silence causes a clicky artifact instead of a seamless loop. OGG contains additional metadata to determine the exact end of the sound stream. WAV files are not made up of frames- they have an exact endpoint and will not cause this artifact.

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