[sdiy] Experiment with bandlimited ramps

[Oren Leavitt]

Tom Wiltshire wrote:
> Hi All,
> 
> I've done some experiments generating bandlimited ramp waves at  various 
> frequencies and with various numbers of harmonics. The  results (lots of 
> sound files - page loads fairly slowly) are at:
> 
> http://www.electricdruid.com/index.php?page=thoughts.bandlimited
> 
> The idea was to find out practically how many harmonics are required  
> for an accurate additive synthesis. Since by the time you're at a  5KHz 
> fundamental, you'd be lucky to hear the 5th harmonic, I started  at 
> about 85Hz. These low notes need the most harmonics to sound good.
> 
> Have a listen and see what you think.
> 
> T.
> 
Hi Tom,

Nice experiment - Starting with the bass tone, I definitely notice a 
difference between 100 and 150 harmonics, and a little difference 
between 150 and 200.
For +1 octave - A definite difference between 60 and 80, and a slight 
difference between 80 and 100.
For +2 octave - A definite difference between 40 and 60, barely 
noticable difference between 60 and 80.
I am listening through a pair of large Altec A7 Voice Of The Theatre 
speakers.

- Oren