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Difference between revisions of "User Manual"
→Output sample rate: Copy and paste from manual.xml (with tweaks)
Spookypeanut (talk | contribs) (→User's Guide: Fix some links) |
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==== Volumes settings ==== | ==== Volumes settings ==== | ||
==== Output sample rate ==== | ==== Output sample rate ==== | ||
The output sample rate tells ScummVM how many sound samples to play per channel per second. There is much that could be said on this subject, but most of it is beyond the scope of this document. The short version is that for most games 22050 Hz is fine, but in some cases 44100 Hz is preferable. On extremely low-end systems you may want to use 11025 Hz, but it’s unlikely that you will have to worry about that. | |||
To elaborate, most of the sounds that ScummVM has to play were sampled at either 22050 Hz or 11025 Hz. Using a higher sample rate will not magically improve the quality of these sounds, thus 22050 Hz is fine. | |||
Some games use CD audio. If you use compressed files for this, they are probably sampled at 44100 Hz, so for these games that may be a better choice of sample rate. | |||
When using the Adlib, FM Towns, PC Speaker or IBM PCjr music drivers, ScummVM is responsible for generating the samples. Usually 22050 Hz will be plenty for these, but there is at least one piece of Adlib music in Beneath a Steel Sky that will sound a lot better at 44100 Hz. | |||
Using frequencies in between is not recommended. For one thing, your sound card may not support it. In theory, ScummVM should fall back on a sensible frequency in that case, but don’t count on it. More importantly, ScummVM has to resample all sounds to its output frequency. This is much easier to do well if the output frequency is a multiple of the original frequency. | |||
== Appendix: Supported games == | == Appendix: Supported games == | ||
(well this already exists on the wiki, so just link to these pages, but also see the extra notes below) | (well this already exists on the wiki, so just link to these pages, but also see the extra notes below) | ||
== Appendix: Tools == | == Appendix: Tools == | ||
(describe each ScummVM command line tool in detail. Game pages might link to this.) | (describe each ScummVM command line tool in detail. Game pages might link to this.) | ||