On Tue, Apr 2, 2013 at 3:12 PM, Paul Davis <paul(a)linuxaudiosystems.com>wrote;wrote:
On Tue, Apr 2, 2013 at 2:35 PM, Monty Montgomery <xiphmont(a)gmail.com>wrote;wrote:
Regular WAV at ~CD rate is limited to about 5
hours because the length
encoding fields are 32 bit. You need to generate an extended WAV with
the WAVEFORMATEXTENSIBLE struct that allows a 16 exabyte data chunk.
I'm a little surprised sox doesn't do that by default.
I wasn't aware that WAVEFORMATEXTENSIBLE covered file sizes - the spec
seems to be mostly about "higher resolution" sample formats. what did i
miss?
Specifically:
"The WAVE_FORMAT_EXTENSIBLE format code indicates that there is an
extension to the Format chunk. The extension has one field which declares
the number of "valid" bits/sample (wValidBitsPerSample). Another field (
dwChannelMask) contains a bits which indicate the mapping from channels to
loudspeaker positions. The last field (SubFormat) is a 16-byte globally
unique identifier (GUID)."
it does not change the size of the size field of the RIFF or data chunks,
which is what matters here.