help with custom-convert.conf to pipe wavin to sox

im using wavin to input from a dab radio and all is working well to mp3 or flac, but i need to do the conversion to mp3 and/or flac using sox so i can use sox's features to downmix to mono and add some basic tone controls for each player, using the mac address and an entry for each player

ive tried lots of combinations in custom-convert in the wavin install folder, but cant get wavin | sox to work for either mp3 or flac. my enties appear in the file types, so my custom.convert is being picked up, but the steam doesnt make it to the players and in most cases the play counter stops after a few seconds

i have the mp3 libraries in the sox folder and a command line to convert wav to mp3 or wav to flac using sox works ok
can anyone give me some help please?
some of the things i have tried include:

wavin mp3 * *
[wavin2cmd] -o $FILE$ | [sox] -q -t pcm - -t mp3 -

wavin flc * *
#D:{RESAMPLE=-r %d}
[wavin2cmd] -o $FILE$ | [sox] -D -q -t wav - -t flac -e signed -C 0 -b 24 $RESAMPLE$ - bass +6 trebble -3

thanks