FOAK: Changing MP3 Frequency.
in [UK Motorcycles]
|
Prev: Respect
Next: Changing MP3 Frequency.
From: bod43 on 22 Apr 2010 11:19 On 22 Apr, 16:03, "Krusty" <dontwant...(a)nowhere.invalid> wrote: > Simian wrote: > > Jim wrote: > > > > On 22/04/2010 10:01, Krusty wrote: > > > > I've got an MP3 which I want to change to around 22Khz, thus > > > > making it inaudible to humans. Is such a thing possible without > > > > buying fancy software? I've got GoldWave but can't figure out how > > > > to do it. > > > > Since most audio equipment available to you is going to use a > > > sampling rate of 44.1 or 48kHz then surely this isn't going to work > > > - you will just end up with noise. > > > You can produce a nice 22050Hz sine wave from a 44.1KHz sample rate. > > > Not sure why you'd want to start with an MP3 rather than just write > > the WAV directly, though. > > Because I need something that'll make them bark, i.e. another dog > barking. Thing is, it will then just sound like another yappy Jack Russell which they likely won't mind:) Will be interesting to find out if they are fooled.
From: Simian on 22 Apr 2010 11:20 Krusty wrote: > Simian wrote: > > > Jim wrote: > > > > > On 22/04/2010 10:01, Krusty wrote: > > > > I've got an MP3 which I want to change to around 22Khz, thus > > > > making it inaudible to humans. Is such a thing possible without > > > > buying fancy software? I've got GoldWave but can't figure out > > > > how to do it. > > > > > > Since most audio equipment available to you is going to use a > > > sampling rate of 44.1 or 48kHz then surely this isn't going to > > > work - you will just end up with noise. > > > > You can produce a nice 22050Hz sine wave from a 44.1KHz sample rate. > > > > Not sure why you'd want to start with an MP3 rather than just write > > the WAV directly, though. > > Because I need something that'll make them bark, i.e. another dog > barking. Ah. In that case, I'd probably go with a nice single frequency 40KHz transducer as loud as can be afforded (you can get them in multi-kW forms). Would also keep the adjoining wall clean.
From: Krusty on 22 Apr 2010 11:41 steve robinson wrote: > Krusty wrote: > > > > > Because I need something that'll make them bark, i.e. another dog > > barking. > > > Krusty i have some schematics of a cannine controller and a sonic > pain field generator you can knock up yourself for a few quid if > you want copies , i can even supply you component lists When you say 'knock up yourself', how difficult are we talking, bearing in mind I know zero about electronics? -- Krusty
From: Krusty on 22 Apr 2010 11:42 Simian wrote: > Krusty wrote: > > > > Because I need something that'll make them bark, i.e. another dog > > barking. > > Ah. In that case, I'd probably go with a nice single frequency 40KHz > transducer as loud as can be afforded (you can get them in multi-kW > forms). Would also keep the adjoining wall clean. I've looked for 'something to generate ultrasonic sound' in the past & failed miserably. Got any links? Nothing on RS that I can find. -- Krusty
From: DozynSleepy on 22 Apr 2010 12:06
On 22/04/2010 16:41, Krusty wrote: > steve robinson wrote: snip >> >> Krusty i have some schematics of a cannine controller and a sonic >> pain field generator you can knock up yourself for a few quid if >> you want copies , i can even supply you component lists > > When you say 'knock up yourself', how difficult are we talking, bearing > in mind I know zero about electronics? > Personally I'd fork out the �17.97 for the wonderfully apt sounding "Mega-sonic woof woof". http://cgi.ebay.co.uk/290298857585 -- DozynSleepy |