Hi, I have an audio dilema. I am working on a reel and had to convert around 100 dvd's to quicktimes.

The codec that I used made the audio format 32-bit floating Point and 48khz. As I'm finding now, FCP (version 7.0.3) only allows 24-bit floating point in the sequence presets.

This forces me to render the audio for each quicktime. I am debating going back and re-rendering every quick time but this will take forever. I can't seem to find a codec in compressor that just compresses the audio without taking 3 hours per quicktime to render the video as well. Is there a way to edit with a 32-bit audio file in fcp? If not, is there a way to change the audio in compressor from 32-bit to 24 or 16 bit without having to have an immense amount of compression time for 100 quick times? Thanks for the help Douglas Glover.

Topic: 32bit Floating Point Audio Editing For Mac Free

Going back I see a pass-through for the audio, but not for the video. That siad, if it's taking three hours I'm hesitant to believe that your settings are the same unless you're using a long GOP codec like H.264 or mp4 or the videos are three hours long. If you aren't working in a RT codec like any member of the ProRes family or the DV family it would be wise to switch to such a codec along the way. Alternatively, you could do a pass in Compressor with the video disabled, then reconnect to the audio re-encoded in Final Cut.

This isn't an ideal situation, but it would work quickly if transcoding is taking too long. Michael Gissing 'Yes Rafael, there is a 32 bit float audio file format. In a program like Audcaity, Nuendo and Samplitude it is a file record format option.' Hi Michael, Those programs can sample and process at 32bFP, but no one of them put out any kind of file/codec/format that is 32bFP.

FP is about wider dynamic range and even if possible, they make no sense in an audio track of a video clip. In Video/graphics, FP is used to keep off-specs levels. Douglas Glover ' As I'm finding now, FCP (version 7.0.3) only allows 24-bit floating point in the sequence presets. ' FC only allows 8, 16 and 24b samples at 32, 44,1, 48, 44,2 and 96 Khz.

Nothing related with Floating Point here. Rafael Amador 'FP is about wider dynamic range and even if possible, they make no sense in an audio track of a video clip. In Video/graphics, FP is used to keep off-specs levels.

' Floating point has three big advantages for visuals:. Large dynamic range (the difference between black and white). Values above and below clipping (values brighter than white and darker than black, very useful when chaining effects). Very high precision (leading to reduced quantization or rounding errors, also useful when chaining effects) With fixed point or integer math, the gap between any two adjacent numbers is constant. With floating point, the gap between any two adjacent numbers is proportional to the number itself - about ten million times smaller than the number. In other words, large numbers are spaced further apart, but small numbers are spaced closer together, giving you incredible precision in the lower/darker/quieter end of the range. I'm not an audio whiz, but I imagine all these benefits would be as important with audio signal processing as they are with video.

Walter Soyka Principal & Designer at Motion Graphics, Widescreen Events, Presentation Design, and Consulting - What I'm thinking when my workstation's thinking Creative Cow Forum Host: Live & Stage Events. As usual you nailed it down Walter. 'In Video/graphics, FP is used to keep off-specs levels. ' When i wrote that I was thinking about what i consider the most interesting feature of FP for my workflows. When I use NeatVideo in FC before sending to Color, thanks to the FP capability of FC, theres is not any signal clipping. In that case the 32bFP process ends up on a 10bYUV file with the highlights untouched. Walter Soyka 'I'm not an audio whiz, but I imagine all these benefits would be as important with audio signal processing as they are with video.'

I agree, but my point was about 'Floating Point' formats, or codec or files. I understand Floating Point as way of making maths, but not an option for storing data. However I'm not a sound expert neither. Michael Gissing 'In output file options it offer 16, 24, 32 floating point and 64 floating point.

64-bit floating point? A lot of visual systems cheat and use half-float for storage, because full 32-bit floating point is usually unnecessary. I'd think that double-float would be absurd overkill.

Walter Soyka Principal & Designer at Motion Graphics, Widescreen Events, Presentation Design, and Consulting - What I'm thinking when my workstation's thinking Creative Cow Forum Host: Live & Stage Events. Yes Walter absurd overkill has been common in audio where bandwidths are low and people imagine all sorts of benefits from a file with dynamic ranges of over 300db.

Hi bit rate floating point is perfectly understandable for audio processing like EQ and mixing many hundreds of tracks together as it enable rounding errors to be very low and discarded when the final 24 bit file is produced. But electronics cannot better 21 bits due to solid state thermal noise so even the 130+ db dynamic range of 24 bit is not reproducible. But people will swear that a 32 bit file sounds better though the same 24 bit D to A. Michael Gissing 'Yes Walter absurd overkill has been common in audio where bandwidths are low and people imagine all sorts of benefits from a file with dynamic ranges of over 300db.' Can you frame that for me? Decibels are logarithmic, right? 300 dB strikes me as incomprehensibly loud.

Michael Gissing 'Hi bit rate floating point is perfectly understandable for audio processing like EQ and mixing many hundreds of tracks together as it enable rounding errors to be very low and discarded when the final 24 bit file is produced.' Totally understand. I've saved out image sequences in floating point as intermediates destined for additional processing before final delivery. Walter Soyka Principal & Designer at Motion Graphics, Widescreen Events, Presentation Design, and Consulting - What I'm thinking when my workstation's thinking Creative Cow Forum Host: Live & Stage Events. Rafael Amador 'Very interesting and nothing to discuss. You know that you are my audio adviser michael:-)' Indeed.

Thanks for the interesting diversion, gents. Rafael Amador 'BTW one question Walter. Do After Effects works in 32FP, or just 32b? I ask because, on my experience, AE clips any peak over 100%.' Starting with AE CS3 (when Adobe introduced their MediaCore framework instead of relying on QuickTime for RGB/YCbCr conversion), AE can handle overbrights from certain codecs in 32bpc projects. If you need to get overbrights back to FCP from AE, render with Trillions of Colors to the AJA 10-bit RGB format and set FCP to process maximum white as super-white. There are only a handful of output formats that support floating point, and they're all image formats (so you'd have to use image sequences with an app that supports them): Photoshop, OpenEXR, and TIFF.

I'll also note that OpenEXR only stores half-float (16b FP) by default, though it can be forced to store 32b FP if you choose. Walter Soyka Principal & Designer at Motion Graphics, Widescreen Events, Presentation Design, and Consulting - What I'm thinking when my workstation's thinking Creative Cow Forum Host: Live & Stage Events.