Programmer Guide/Command Reference/EVAL/hz2cent: Difference between revisions
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;See also: [[Programmer_Guide/Command_Reference/EVAL/hz2mel|hz2mel, mel2hz]], [[Programmer_Guide/Command_Reference/EVAL/hz2erb|hz2erb, erb2hz]], [[Programmer_Guide/Command_Reference/EVAL/hz2bark|hz2bark, bark2hz]], [[Programmer_Guide/Command_Reference/EVAL/hth|hth]], [[Programmer_Guide/Command_Reference/EVAL/log2lin|lin2log, log2lin]] | ;See also: [[Programmer_Guide/Command_Reference/EVAL/hz2mel|hz2mel, mel2hz]], [[Programmer_Guide/Command_Reference/EVAL/hz2erb|hz2erb, erb2hz]], [[Programmer_Guide/Command_Reference/EVAL/hz2bark|hz2bark, bark2hz]], [[Programmer_Guide/Command_Reference/EVAL/hth|hth]], [[Programmer_Guide/Command_Reference/EVAL/log2lin|lin2log, log2lin]] | ||
Example: | |||
<pre> | |||
#hz := eval vv(100, 200, 440, 880) | |||
#cent1 := eval hz2cent($#hz) | |||
#cent2 := eval 1200 * ld($#hz / 440) // this is a the same as #cent1 | |||
</pre> | |||
[[Programmer_Guide/Command_Reference/EVAL#Functions|<function list>]] | [[Programmer_Guide/Command_Reference/EVAL#Functions|<function list>]] | ||
Revision as of 15:39, 6 April 2011
Convert the elements of x from Hertz to Cent and vice versa.
- Usage
hz2cent(x {, ref {, ofs}})log2lin(x {, ref {, ofs}})- x
- a scalar, vector or matrix
- ref
- the reference frequency in Hz; must be a positive number (default=440)
- fac
- a shift value in Cent; must be a number (default=0)
- Result
- The result r has the same type as x and contains the converted elements of x. The following conversion algorithms are used:
- hz2cent: ri,j = 1200 * log2(xi,j / ref) + ofs
fac * log10(xi,j / ref)
- cent2hz: ri,j = ref * 2 ^ ((xi,j - ofs) / 1200)
- See also
- hz2mel, mel2hz, hz2erb, erb2hz, hz2bark, bark2hz, hth, lin2log, log2lin
Example:
#hz := eval vv(100, 200, 440, 880) #cent1 := eval hz2cent($#hz) #cent2 := eval 1200 * ld($#hz / 440) // this is a the same as #cent1
