Okay, so I’m trying to make a bomb detonation sound, and it’s going to be like a high drilling sound that increases in frequency as time progresses. So how would I take a sound and make it slowly gain pitch over time? That’s about all I need to know right now.
Audacity 1.3.13 > Effect > Sliding time and pitch.
Apply the tool to an existing normal tone.
Koz
Duplicate post deleted and topics merged.
Please don’t post the same question more than once, it just wastes time and confuses everyone.
Due to the amount of spam posted to the forum, there will be a delay between posting and your post being approved (as not spam). We apologise for the delay, but it is unavoidable and your question will be responded to as quickly as possible.
David Sky made an Audacity plugin to generate fire / explosion sounds (copy attached).
FIREX.NY (4.95 KB)
Nice 
- where did you find that Trebor?
Just had a quick play with it and would suggest these settings as a starting point:
Audio type [0=fire 1=explosion]: 1
Sound duration [seconds]: 3
Attack time [milliseconds]: 50
Explosion decay time [milliseconds]: 500
Decay down to this level [percent]: 30
Cutoff frequency [hz]: 3800
Filter quality [q]: 20
Bass boost frequency [hz]: 300
Bass boost [db]: 30
clipping amount [percent]: 65
Then after running the effect, try adding the “Leveller” effect set to:
Degree of levelling: Heaviest
Threshold for Noise: -20 dB
I’m sorry— I’ve never been on a forum with a system like this. I’ll be more careful next time.
I’ve added it to the wiki here: http://wiki.audacityteam.org/wiki/Nyquist_Generate_Plug-ins#Fire_and_Explosion_sounds
The uploaded version has slightly different default values to produce a more realistic explosion sound, the license text has been updated and a minor bug fix.
No worries, we’re just wanting to keep the forum tidy, easy to use and spam free. 
Adding David Sky’s linear flanger to your the synthesised explosion gives a realistic fireball effect …
