)
Values for Atari Portfolio tone code:
 04h	A6#01864.7 Hz
 05h	B6	1975.5 Hz
 06h	D7	2348.3 Hz
 07h	D7#	2489.0 Hz
 0Eh	F6#	1480.0 Hz
 25h	C7	2093.0 Hz
 29h	D6	1174.7 Hz
 2Ch	G6#	1661.2 Hz
 2Fh	C7#	2217.5 Hz
 30h	D5#	622.3 Hz
 31h	E5	659.3 Hz
 32h	F5	698.5 Hz
 33h	F5#	740.0 Hz
 34h	G5	784.0 Hz
 35h	G5#	830.6 Hz
 36h	A5	880.6 Hz
 37h	A5#	932.3 Hz
 38h	B5	987.8 Hz
 39h	C6	1046.5 Hz
 3Ah	C6#	1108.7 Hz
 3Bh	D6#	1244.5 Hz
 3Ch	E6	1318.5 Hz
 3Dh	F6	1396.9 Hz
 3Eh	G6	1568.9 Hz
 3Fh	A6	1760.0 Hz