HDCD CDs and transcoding

[vkshankar]

So I have decided to get rid of the Oppo BDP - 83 from my setup given its limitations. Instead I now have a TEAC NT-505. The TEAC NT-505 does not have HDCD decoder, so I am doing on the fly decoding with minimserver 2/minimstreamer with the following options:
stream.options -> convOut = -af hdcd -c:a pcm_s24le
stream.transcode -> wav:wav24
This works great if I play a HDCD encoded file. HDCD is decoded at the minimserver 2/minimstreamer end, and a 24bit stream is sent to the TEAC NT-505, thankfully this renderer can handle wav fmt. TEAC NT-505 gracefully plays and I definitely hear the 6db avg. attenuation vs. streaming the file with out the above mentioned option. Also ffmpeg logs show the per sample HDCD PE and LLE values indicating that HDCD decode is happening.
Now, if I play a regular wav file without HDCD encoding, I still have an avg 6db attenuation because of the stream.options and stream.transcode settings.
Is it possible to tell the minimstreamer to not kick-in and do the transcoding when regular file is played? Even if it means creating an .m3u file like what is done when handling network streams with the special formatting:

[id] name

In the below .m3u example, first 2 wav files would be transcoded, whereas 3 will not be handled by minimstreamer/transcoded

#EXTM3U
#EXTINF:229,[Minnesota] Dance of the Tumblers
01 Dance of the Tumblers.wav
#EXTINF:582,[Minnesota] Dance of the Seven Veils
02 Dance of the Seven Veils.wav
#EXTINF:252,Minnesota Hopak
03 Hopak.wav

Not sure about this, but just a thought.