Indeed, DTS-MA does not allow 44.1kHz wavs.
If you have DTS-Wav files, you can just burn them on a disc (see ) and that disc will play just fine on a PS3. But you'll have to tell the PS3 to also allow 44.1kHz files. I think it is somewhere in Audio Settings where you select optical or HDMI as output and then the formats that you want to allow for. Please, please, please, while testing this on a PS3, turn down the volume, because if the PS3 does not correctly interpret the DTS stream within the Wav file, you'll get static noise and that could potentially harm your speakers. You have been warned
If you want to convert that multi-channel wav file (which needs to be in 48kHz or above. Go to the Audio Conversion panel in AudioMuxer and select the resample to "48000" or above option and hit the "Mono-Wav" button) to DTS or DTS-MA, you'll need the Surcode DTS Encoder or the DTS Master Audio Suite. Both are commercial products. Once you'll have that .DTS/.CPT or .DTSHD file, then you can just load that file in AudioMuxer, select the MKV/AVCHD Mux option, but do not forget to select the "4Gb Split" and "8.3 file format" option if you want to play the result on a PS3. When the AVCHD is created, copy that full AVCHD directory on a FAT-32 USB stick or drive and you will be able to play that without a problem on a PS3 through the Video selection panel.
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