[R] reducing the sampling rate of a .wav file

[Uwe Ligges]

On 22.10.2014 21:57, Dimitri Liakhovitski wrote:
> I've read in a wav file using 'tuneR':
>
> silence<-readWave("silence0.5sec.wav")
>
> I run summary(silence):
>
> Wave Object
> Number of Samples:      22051
> Duration (seconds):     0.5
> Samplingrate (Hertz):   44100
> Channels (Mono/Stereo): Mono
> PCM (integer format):   TRUE
> Bit (8/16/24/32/64):    16
>
> Summary statistics for channel(s):
>
>     Min. 1st Qu.  Median    Mean 3rd Qu.    Max.
>        0       0       0       0       0       0
>
>
> I would like to save this file as a lower frequency file so that:
> Samplingrate (Hertz):   8000
>
> Is it possible?
> I am trying:
> savewav(silence,filename="silence0.5sec 8000.wav",f=800)
>
> But it doesn't work - it saves the file but when I read it in,
> Samplingrate is still 44100
>

What is savewav? At least not a tuneR function...

In "tuneR":


silence8000 <- downsample(silence, 8000)
writeWave(silence8000, file="silence0.5sec 8000.wav")

Best,
Uwe Ligges