[LAU] ambisonics: fons ambdec and muse.demon.co.uk ambidec

[Jörn Nettingsmeier]

On 01/07/2011 09:10 AM, Giso Grimm wrote:
> Hi,
>
> On 01/07/2011 12:33 AM, fons at kokkinizita.net wrote:
> [...]
>
>>
>> Azim and elev are in radians, to convert to degrees multiply by
>> 180/pi. Note that for all layouts on the demon page, dist will
>> be 1 for all speakers. For ambdec you should use the real distance.
>>
>
> in ambdec, is the distance used for anything else then delay and gain
> compensation? Is it correct that for regular setups this does not matter?

it is also used for near-field compensation. in first order, you can get 
away without, since the effect (a noticeable bass boost) only kicks in 
below 50hz or so, but as soon as you move to 2nd or higher orders, you 
really want NFC.