Propellerhead Reason - 4.0 Manual de operaciones descargar pdf (Pagina 142)

OPTIMIZING PERFORMANCE

140

Introduction

Reason is a program of infinite possibilities. You can create as complex songs as you

like, using endless racks of devices. While this is one of the most exciting properties

of the program it does have a drawback – it means that you must be careful with how

you manage your computer processing power.

Each device you add to the rack uses up a bit of computer processing power – the

more devices the faster the computer has to be. However, you can set up your de-

vices to require more or less processing power. For example a sound on the Subtrac-

tor synthesizer that only uses one oscillator and one filter requires much less

processing power than one using both dual oscillators and dual filters.

Samples used in your songs also require RAM - memory - to load properly. The use of

RAM can also be managed, as described at the end of this chapter.

When creating songs for other people, for example for publishing in the Reason song

archive (see www.propellerheads.se for more information), you should do what you

can to reduce the requirements for playing back a certain song, both in terms of pro-

cessing power and in terms of RAM requirements. Other users may not have as pow-

erful a computer as you do!

Checking Processing Power

On the transport you will find a meter labelled DSP. This indicates how much pro-

cessing power is used at any given moment.

The DSP meter.

The higher this meter goes, the higher the strain on your computer processor. You will

note when your processor is heavily loaded that graphics will update slower. Finally,

when there’s too little power left to create the audio properly, the sound will start

breaking up.

Optimization and Output

Latency

As described on page 18, you generally want the lowest possible latency, to get the

best response when you play Reason in real time. However, selecting too low a la-

tency is likely to result in playback problems (clicks, pops, dropouts, etc.). There are

several technical reasons for this, the main one being that with smaller buffers (lower

latency), the average strain on the CPU will be higher. This also means that the more

CPU-intensive your Reason song (i.e. the more devices you use), the higher the mini-

mum latency required for avoiding playback difficulties.

Therefore, you may need to adjust the latency. This is done differently depending on

which audio cards, drivers and operating system you are using:

Making adjustments in the ASIO Control Panel

If you are using an ASIO driver specifically written for the audio hardware, you can in

most cases make settings for the hardware in its ASIO Control Panel. This panel

(opened by clicking the ASIO Control Panel button in the Preferences-Audio dialog)

may or may not contain parameters for adjusting the latency. Usually this is done by

changing the number and/or size of the audio buffers - the fewer and smaller the au-

dio buffers, the lower the latency. Please consult the documentation of your audio

hardware and its ASIO drivers for details!

! Raising the buffer size to eliminate audio artefacts on playback is mainly

effective if you are currently using very small buffers, 64 to 256 samples.

If the buffers are already big (1024 or 2048 samples) you will not notice

much difference.

Making adjustments in the Reason Preferences dialog

If you are running Reason under Windows and using an MME or DirectX driver, or if

you are running Reason under Mac OS X and using the Built-in audio controller driver,

you can adjust the output latency in the Preferences – Audio dialog.

D This is done by dragging the Buffer Size slider.

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