Toni: moved Programmer Guide/SPU Reference/ADDSYN - additive synthesis to Programmer Guide/SPU Reference/ADDSYN

2011-04-28T09:22:01Z

moved Programmer Guide/SPU Reference/ADDSYN - additive synthesis to Programmer Guide/SPU Reference/ADDSYN

← Older revision	Revision as of 11:22, 28 April 2011
(No difference)

Admin: 1 revision: Initial import

2010-11-18T16:31:53Z

1 revision: Initial import

← Older revision	Revision as of 18:31, 18 November 2010
(No difference)

193.171.195.8: initial import

2010-05-17T13:05:27Z

initial import

New page

{{DISPLAYTITLE:{{SUBPAGENAME}}}}
====ADDSYN - additive synthesis====

=====Usage:=====

<code>ADDSYN <var>sr l f a p nc df da</var></code>

=====Inputs:=====

{|
|-
|sr
|sampling rate in Hz
|-
|l
|length of output buffer (number of samples / evaluation cycle)
|-
|f
|frequency in Hz
|-
|amp
|amplitude(s) (linear)
|-
|p
|phase (initial phase settings)
|-
|nc
|number of components
|-
|df
|frequency/ies increment in Hz
|-
|da
|magnitude factor
|}

=====Outputs:=====

{|
|-
|<var>y</var>
|number (l=1) or vector (<var>l</var>>1), synthesized signal
|}

=====Function:=====

This atom using additive synthesis of sine waves to generate a signal. The signal of sampling rate <var>sr</var> is stored in the output <var>y</var>. The inputs (except <var>p</var> and <var>nc</var>) are updated at the beginning of each evaluation cycle to allow modulations. For the additive synthesis the following formula is used:

[[File:1200.png]]

with:

{|
|-
|
|
|
|
|-
|Number of components ([[File:3067.png]]):
|-
|
|f and <var>amp</var> are numbers
|[[File:3067.png]] is set to value of input nc (>0)
|-
|
|f is a number, <var>amp</var> is a vector
|[[File:3067.png]] is set length of amp
|
|-
|
|f is a vector, <var>amp</var> is a number
|[[File:3068.png]] is set length of f
|
|-
|Component frequencies ([[File:3069.png]]):
|-
|
|f is a number
|[[File:3070.png]] = f + i.<var>df</var>
|
|-
|
|f is a vector
|[[File:3071.png]] = f[i]
|
|-
|Component amplitudes (ai):
|-
|
|amp is a number
|ai = amp.<var>da</var>i
|
|-
|
|amp is a vector
|ai = amp[i]
|
|-
|Initial phases of components (ji):
|-
|
|p is a number
|
|ji = p
|-
|
|p is a vector
|
|ji = p[i]
|-
|
|p is a string:
|p=SIN
|ji = 0
|-
|
|
|p=COS
|ji = p / 2
|-
|
|
|p=SINCOS
|ji = 0 if i is even and p/2 otherwise
|-
|
|
|p=COSSIN
|ji = p/2 if i is even and 0 otherwise
|}

Programmer Guide/SPU Reference/ADDSYN - Revision history

Toni: moved Programmer Guide/SPU Reference/ADDSYN - additive synthesis to Programmer Guide/SPU Reference/ADDSYN

Admin: 1 revision: Initial import

193.171.195.8: initial import