Originally posted by Joe4all
I have heard about software that would make it possible to play an audio-CD at lower speed without changes in pitch
1. Sonic Forge 6.0 :
The Time Stretch effect allows you to alter the length of a signal without changing its pitch.
What do you want to do?
Change the length of a sound
Open the Sonic Foundry Time Stretch dialog.
Choose a preset from the Name drop-down list, or adjust the controls as desired:
a. Choose a Mode from the drop-down list.
Time Stretch provides 19 different modes that are designed to maintain the highest quality for specific types of material.
A mode that works great for drums will not work as well for string pads, for example.
You should be able to achieve excellent results for ratios between 75% and 115%. Beyond this range, you will start to hear artifacts such as echoes, flanging, or drop-outs.
Also, running the process a number of times using small increments (such as 105%) will create different effects than processing all at once with a large time change.
b. Drag the Final Percentage slider to change the length of the selection.
Nero Wave Editor :
An audio file can be shortened or extended by means of time correction.
When sampling files that are made up of loops, time correction is particularly important -
in order that all the audio elements have the same length.
The undesired side-effects caused by time correction can be remedied selectively, depending on the audio element.
- Open the desired file.
- Select the 'Time Correction' command in the 'Tools' menu.
- Set the correction factor â€“ either by entering a number or by turning the knob.
- Choose the appropriate optimizing method by clicking on the dropdown
button and highlighting the desired list box field.
Click on the button to play back the audio file with the changes stated. This
allows you to check straightaway that you are happy with the results.
- Click on the 'OK' button to take over the changes.
Hopefully this helps.