This would be a cool fusion of K-M artists...it's always better to collaborate via e-mail, for the purpose of sending & working with individual tracks....in the event that further mixing & polishing of the material is necessary...
I'll be happy to walk you through it all if you want and believe me,it's well worth the extra time & effort.
I agree that the best possible audio quality is essential for successful on-line collaboration. FLAC and MonkeesAudio lossless codecs are an excellent choice, but when file size is important, Ogg Vorbis is an excellent alternative. A/B listening tests show that audio files compressed with Ogg Vorbis level 6 are indistinguishable from the original wave file for all but the most discerning listeners.
In this case, with internet speed being an issue, an Ogg Vorbis version (compressed from the original wave file mix, not from the MP3) of the instrumental mix will provide accurate timing and pitch. Each of us can load that into our DAW and record/produce a vocal track.
Then, we can post our dry vocal track -
impablomations can download, EQ, and add reverb, and mix it with his instrumental tracks. Simply posting the vocal tracks here as high-definition Ogg Vorbis files (level 6 or better) would provide acceptable fidelity, while making his downloads more manageable.
Am I making any sense, yet?