Test Tones Download
Please note that this is a download that you will have to burn to a CD. These are the same test tones that have been included with the full version of my Basic Car Audio Electronics web site. I'm now making them available as a stand-alone product.
The test tones CD is in Nero NRG format. If you have Nero installed, you should be able to simply double-click the file and Nero will open. If the NRG file association is set to load other software, you can open Nero and load the file manually. If Nero isn't installed, you can download a free evaluation version from their site.
Sine Wave and Noise Tracks:
There are 76 audio files on the test tones CD. There are 57 sine waves at various frequencies between 10hz and 20,000hz. All are recorded at 0dBfs. They are 10 seconds in length. There are 4 'noise' files white noise, pink noise and brown noise. 3 are 60 seconds long. One pink noise track is 10 minutes long. Pink and brown noise are used to set up your system. Brown noise is essentially pink noise with the high frequencies significantly attenuated. There is also a 'silence' track. It allows you to listen to the noise floor of your system. Simply setting the volume to zero volume may mute the deck's output and mask noise coming from your head unit. If you're checking your system with the silence track, be sure to turn the volume down on the deck before the track ends. If your head unit has a repeat function, use it to repeat the silence track. If you have your volume set to maximum and the next track starts, there may be significant damage to your speakers.
There are several sweeps. There are eleven 10 second
long sweeps that cover only a 10hz range 40-30, 90-80.... You can use the seconds counter to estimate the frequency. On the 40-30hz sweep, it will pass 35hz at 5 seconds. The 90-80hz sweep will pass through 88hz at 2 seconds. The same estimates can be made for the 20-20,000hz sweeps. For the '20' second sweep, multiply the second count by 1000. 10 seconds will be approximately 10,000hz. One second corresponds to 1000hz. For the '200' second 20-20,000hz sweep, multiply the seconds by 100 at 3 seconds, the tone will be ~300hz - at 3:00, the frequency will be about 18,000hz.
|The cost of the download is $4.95US. The file is ~350MB so it will take only a few minutes to download if you have a fast broadband connection. If you're using a dial-up connection ,the download is likely going to take several hours. A test download took less than 5 minutes on my connection. |