HP 48SX/GX Music Player

Announcement: HP48 Shatters Its Bonds of Musical Mediocrity 

Numerous dedicated software writers have developed programs to reproduce 
music on the HP48, but all of their efforts have
suffered the vagaries of The BEEP Function, which is hardly suitable for 
fine music. 

Now, musicians and critical listeners no longer need grimace in pain as 
the HP48 chokes out ill-intoned musical strains under
the control of BEEP. Author Paul Oelund, an electronics engineer working 
in flight controls, has extensive experience in design
and development of real-time signal processing software. He has brought 
his expertise to bear on the problem of elevating the
HP48 to true musical excellence. 

The new music software, based on machine-code core program MP, eliminates 
the distortion-producing jitter effects of the
display subsystem for greatly improved timbre, and replaces BEEP with its 
own proprietary tone- generation subroutine
achieving 0.5 microsec (HP48S/SX) or 0.25 microsec (HP48G/GX) resolution. 
This translates to unrivaled tonal accuracy
throughout the entire range of the piano, and beyond. 

This breakthrough is further enhanced by rhythm timing which is so 
precise that multiple calculators can play duets and
ensembles together with no perceptible drift. The entire performance is 
under control of MP, so there are never unwanted
pauses. Flexibility is unequalled: You can specify a different tempo 
and/or key for each performance, or re-tune your HP48 to
match another instrument. 

All of this is accomplished with very meager demands upon RAM space. The 
basic library containing MP occupies less than
2500 bytes. Joplin's "The Entertainer" (complete, over 3.5 minutes long) 
is coded in only 896 bytes, and Chopin's "Minute"
waltz requires less than 680 bytes. 

Hear the full virtuosity of your HP48. Gather with HP48-owning friends 
and experience the sublime HP48 ensemble. 

The program also can be obtain at http://weber.u.washington.edu/~le/hp48