[linux-audio-dev] Fixed vs. floating point

Mark Stewart mark at filigreemusic.com
Fri Oct 14 22:11:40 EDT 2005


On 14-Oct-05, at 1:44 AM, cpolymeris at gmx.net wrote:


> I am in the early planning stage of an audio processing application  
> and I
> have come to the point of making the choice between floating point  
> or fixed
> point (signed 2's complement) processing.
> What do you think is better, and why? Why does jack use floating  
> point? Why
> does AES use fixed point in most of their standards?
>

Here's some papers specifically geared toward DSP processors that
support the use of fixed point:

Superior Audio Requires Fixed-Point DSP
     http://www.rane.com/note153.html

48-Bit Integer Processing Beats 32-Bit Floating-Point for Professional
Audio Applications
     http://www.jamminpower.com/main/articles.jsp

-Mark


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