Ochre can support sales of 24-bit WAVs. The digital creation process does not allow for 24-bit WAVs to be transcoded to other digital formats.
24-bit WAVs can be uploaded to an existing digital release by going to Actions > Add Digital Formats.
You must have already uploaded 16-bit WAV assets in order to be able to add 24-bit WAVs and you will be asked for as many files as there are tracks on the release. Once the upload has processed, the new digital format must be activated before it will be seen on the front-end Release Page.