Step 1: Open GoldWave
Step 2: Click on "File" on the menu at the top of the GoldWave window
Step 3: Click on "New"
Step 4: Click on the box to the right of where it says "Number of channels"
Step 5: On the list that comes up click on "2 (stereo)"
Step 6: Choose a sampling rate and duration in the other two boxes
Step 7: Click the "OK" button
Step 8: Click on "Tool" on the menu at the top of the GoldWave window
Step 9: Click "Expression Evaluator"
Step 10: Under Presets, click the plus by where it says "Waves"
Step 11: Scroll down until you see "Sine, f = Hz", and click on that
Step 12: Under the section that says "User constants" enter "1000" in the "f =" field
Step 13: Click the "OK" button
Step 14: Right click on the bottom left corner of the GoldWave window where it says "Stereo"
Step 15: Click "Left"
Step 16: Repeat steps 8 and 9
Step 17: Under the section that says "Expression" enter "wave(n)/0.9"
Step 18: Click the "OK" button
Step 19: Click on "Effect" on the menu at the top of the GoldWave window
Step 20: Click "Dynamics"
Step 21: In the graph make sure there are no points between the far left and far right ones
Step 22: If there is then right click on all of them until there is none
Step 23: In the box to the right of "Point:" enter "1"
Step 24: In the box to the right of "Y:" enter "-1"
Step 25: In the box to the right of "Point:" enter "2"
Step 26: In the box to the right of "Y:" enter "1"
Step 27: Click the "OK" button
Step 28: Repeat steps 8 and 9
Step 29: Under the section that says "Expression" enter "wave(n)*0.9"
Step 30: Click the "OK" button
Step 31: Right click on the bottom left corner of the GoldWave window where it says "Left"
Step 32: Click "Both"
You now have your desired sound file!
NOTE: everywhere I say to enter something, do it without the quotes
There is alternate ways to do this, but this is the easiest way I know of (only I also have a preset saved for the dynamics effect though, so I just right click on the dynamics toolbar and choose my preset, but that would've taken more steps to explain how to get it set up that way)
Hope this helps you