Tony: a tool for melody transcription

I think the following sequence of events would make the bounding box pitch estimation more intuitive:

• shift + click/drag a bounding box
• a solid bounding box is drawn on the spectrogram
• user can optionally adjust bounding region
• command + return shows pitches (in black!)
• command + return confirms selection an removes drawn box
• at any point above when box is drawn, escape removes box and returns to normal state