Channel Vocoder manual

Contents



1. Introduction
2. System Requirements
3. Features
4. Usage
5. License
6. Registration
7. Credits
8. Contact


1. Introduction



Thank you for downloading Channel Vocoder! Channel Vocoder is a traditional software channel Vocoder, with a total of 32 channels. A vocoder works by taking a modulator signal, usually a human voice, and a carrier, usually musical chords of some kind, and processing them together to make it sound as if the voice is singing the notes of the carrier. This creates a quite interesting, synthetic effect that is often used to create robot voices for computer games and singing instruments for modern Dance songs. However a channel vocoder has a million other uses as well... The only limit is your imagination and the amount of time that you are willing to spend perfecting your carrier and modulator files.

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2. System Requirements



Windows 98 or above, 128 MB of RAM and at least 10 MB of available disk space. Also remember that high quality Wave files get quite large so make sure you have enough space to store them.

A soundcard is required if you would like to use the preview feature, but not if you are only rendering to disk. Please note that the audio may break up while previewing on older computers, if the processor is unable to stream the audio fast enough. When rendering to disk this is not a problem.

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3. Features




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4. Usage



It is very easy to use Channel Vocoder. First you select the carrier wave file either by entering its path in the text field or clicking on the browse button next to it. You do the same for the modulator and the output files. It is not necessary to select an output file if you only want to preview, but the carrier and the modulator files are always mandatory.

After you have selected the files to use, the interesting part begins. Now you can either save the result to disk if you have selected an output file by clicking on the vocode button, or listen directly without saving the audio to your hard drive by clicking preview. If you are saving to disk you cannot adjust any parameters while the audio is being processed, so make sure you get the settings right first. This is where the preview feature comes in handy, because you are able to change the vocoder parameters in real-time. This allows you to find the perfect settings for your particular project without having to save the audio to a file each and every time.

There are two main factors that control the vocoding process, instrument clearance and vagueness. Instrument clearance simply allows you to select how much of the original instrument you want to hear. If set to 0, the output resembles the voice perfectly and no trace of the instrument can be heard. This may sometimes cause you to lose some of the harmonics of the carrier, so it is not always advisable to set it to 0. Most of the time however, if you are aiming for a clean output and not using a very frequency rich carrier, it will usually produce quite good results.

Vagueness is similar to instrument clearance in a way, the only difference is that it makes the voice sound more like the instrument without actually letting the carrier audio blend through too much unless you crank it up to 80 or 100 percent. As always, the best way to see the difference is to try it out for yourself.

The last parameter that you can adjust is the output gain. All that it does is to set the volume of the output. For example, if you are getting a distorted signal it is most likely because the output gain is set too high. The volume of the output is calculated based on the volume of the carrier, so if your instrument recording is very loud it is not wise to crank up the gain too much. 50 % is good in most situations, but if the carrier is extremely loud you may get distortion even then. Once again... Experiment! In most cases it is necessary to adjust the level of the audio in your sound editor anyway when blending it in a mix, but that is beyond the scope of this manual.

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5. License



If using this program you must accept and abide by all the terms below.

You may

You may not

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6. Registration



Channel Vocoder is Shareware, which means that you can try it out before you decide whether or not to buy the full version. The demo has no time restriction, however it inserts a periodic beeping sound in the output which makes it unsuitable for production use while still giving you the chance to experiment with all the features. The beeping is only inserted in recordings that are 16 bit, 8 bit files sound so bad anyway so that a watermark isn't even necessary. The beep varies in pitch and length depending on the sample rate of the files that are used.

To order the software, follow these steps:
1. Copy your product ID to the clipboard.
2. Visit our website at
http://www.pbsoundscape.net/
and follow the instructions on how to place an order.
3. When you have received your unlock key, click on the register button and enter the key in the text field that appears. When you are done, click OK.
4. If everything worked as expected, the program will be upgraded from a demo to the full version instantly. If something went wrong, feel free to contact us for assistance if you are unable to solve the problem on your own. However, before contacting us please make sure that you entered your unlock key exactly as it appears in your confirmation email with no whitespaces in the beginning or in the end, and that none of the letters are capitalized.

The unlock key that you receive from us is based on your product ID, which is unique for every computer that you run the vocoder on. Thus, the key will only work on the computer from which you obtained the ID. If you have more than one computer and need aditional keys, please contact us.

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7. Credits


The vocoder algorithm was written by Hasan Murod, the user interface was designed by Gemma Hadfield and the surrounding programming and documentation as well as the audio examples was done by Philip Bennefall.

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8. Contact


If you have any questions or comments, if you have found bugs in the software or if you just want to chat, feel free to contact us and we will do our best to help you.

---Copyright Petabit Soundscape, 2007.---