Bill,
Esnips is good. No download wait times, not codes to type in. All your music can be organized in folders. It's very easy to use. Also, Esnips will provide a direct link underneath your file that you can copy and paste for sharing.
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.