Hi, I would like to start an imported sound at a certain time for example 0.118 seconds by hand. How is it done?

Can use the up ↑ and down ↓ keys to dial-in start at 0.118 …
start at 118 milliseconds.gif
or key-in “1”,“1”,“8”.

Thanks but if i want to start the track at the 0.000219 second?

Is that a typing error?

I want to start two sounds imported one at 0 sec and the other 0.000219 seconds later but
I can not start the second at 0.000219 accurate

generate silence at the start of one of the tracks, that will delay it.
“0.000219” seconds at a sample-rate of 44100Hz is ~9 samples …
generate silence  9 samples duration.gif

Digital audio has discrete time divisions. At a sample rate of 44100 Hz, theses time divisions are 1/44100 th second = 0.000022676 s.
0.000219 seconds = 0.000219 x 44100 sample periods = 10 sample periods (or 9, depending on how you round). Note that this must be an integer value because PCM digital audio has discrete time divisions.

To set the start position as close as possible to 0.000219 seconds, set the time units to samples, and select 10 samples.

Note that Audacity is a little peculiar in that it will allow you to paste to a time position that is not an exact number of samples. This is related to Audacity’s ability to support multiple sample rates in the same project. However, that does not alter the physical facts of PCM digital audio, and sample values will always be calculated at discrete sample positions.

Thanks!!! :smiley: :smiley: :smiley: :smiley: :smiley:

It’s possible change the frequency of imported sound wav?

Do you mean the “frequency” (pitch), or the “sample rate” (the number of samples per second)?

To change the frequency, use Change Pitch or Change Speed effects:

To change the sample rate of the Audacity project, select the required rate in the “Project Rate” box: http://manual.audacityteam.org/man/selection_toolbar.html#rate

To change the sample rate of a track, use “Tracks menu > Resample”: http://manual.audacityteam.org/man/tracks_menu.html#resample