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Dithering with the L2

I am using Sound Forge to master. I would like the L2 to dither the songs down to 16 bit from 24 bit (48K). I have selected 16 Bits, Type 1, and Moderate shaping. After I process the audio, Sound Forge says it is still in 24 bit, 48k. How do you get the L2 to dither it to 16 bits?

Comments

Cucco Tue, 01/30/2007 - 05:57
This was always one of the beefs I had with Sound Forge. I used it for a little bit before switching to Sequoia.

When bouncing the final track, you would specify which dither to use, but you still had to go into the bounce preferences and select 16 bit. It made me feel as though it wasn't really dithering using my algorithm of choice.

I wound up contacting Apogee (I used their UV22HR a lot) and despite the fact that they didn't actually support that product in Sound Forge, they gave me the heads up on how to do it. Quite annoying! I much prefer it when things work the way they're supposed to.

Dizzi45Z Tue, 01/30/2007 - 14:11
Thank you for all of your posts. Sorry it took me a day to get back to this. I have been very busy.

I'm not familiar with sound forge but are you bouncing to disc or printing the file to two tracks in the same session?

I was bouncing to disc.

And more importantly, have you READ THE MANUALS for both applications?

I have read the manual for L2 and everything that I could find about dithering and plug-ins and the only way that I have found to apply effects onto a wave file is to bounce to disk which prints the effects to the current wave file you are using.

I presume that you are using the plugin version of L2. If you export your mix, make sure you added the L2 on the stereo bus with the dither settings of your choice (ie;Type 1, and Moderate shaping) and export your mix in 16 bit format within CD Architect.

Yes, I am using the plugin version of the L2. I can't export audio from Sound Forge. It doesn't have a stereo bus either. The way you get your audio out of the program is by rendering it. This is the point where I can have Sony dither the audio down to 16 bits if I want. I did notice that if you import a 24 bit file into CD Architect, it will generally get .3 db louder which can cause problems if you have limited to -.1. So I have been making sure it is 16 bit 44.1k before I go into CD Architect.

When bouncing the final track, you would specify which dither to use, but you still had to go into the bounce preferences and select 16 bit. It made me feel as though it wasn't really dithering using my algorithm of choice.

Exactly. I can get the file to 16 bits by rendering to 16 bit after the effects have been applied. But I do wonder if it uses my algorithm of choice. I wonder if it could be bouncing to 16 bit and then converting back to 24 bit and then dithering to 16 bit with Sony's dither when I render the tracks out of the program.

Dizzi45Z Tue, 01/30/2007 - 14:14
Okay, so I just checked my email and I got a response from Waves about the L2 and L3 plug-in. This is what they said:

Thank you for your email. I am Guy with Waves Tech Support Team.

The L2 plug-in dither adjust and repair digtal errors that occurs while converting the bit depth.The L2 does not convert the file itself.

after you process the L2 you need to save the file in configurations you need, hit File > Save as>

And then adjust the template section to 16 bit.

So it sounds like the L2 and L3 don't actually convert to 16 bit. You still have to convert the file to 16 bit after the L2 or L3 have been applied to the file.

Zilla Tue, 01/30/2007 - 14:55
Dizzi45Z wrote: So it sounds like the L2 and L3 don't actually convert to 16 bit. You still have to convert the file to 16 bit after the L2 or L3 have been applied to the file.

It may help to understand that there is more than one process here:

Firstly, the dithering process reduces the word length (typically to 16bits) while reducing quantization errors. So the result is a data stream output from your main DAW software that has 16bits of resolution.

Secondly, when you bounce/render/export that data, the workstation needs to create a file which will contain this 16bit data. In other words, you need to tell the DAW software what size of container (the file) you would like to pour your data into.

Usually one chooses the file's bit depth and sample rate to match the data being stored. However, it is possible to store 16bit data into a 24bit file (but, of course, you still only get 16bits of resolution). Likewise, you can store 24bits of data into a 16bit file: the result is (usually) a truncated 16bit word.

To answer your question directly: the dithered down output of the L2/L3 plugin will be converted to a 16bit data stream. But when bouncing, you still need to tell SoundForge which type of file to create so it will properly store your dithered data.

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