QCP is a container format previously used by many cell phone manufacturers to create ringtones and record voice. This format was developed by Qualcomm and is based on the RIFF standard, similar to the WAV. Audio data in QCP files is usually compressed with QCELP, EVRC or 4GV codecs. They have a high compression rate, low bit rate and low quality, making them suitable only for voice but not for music.
Qualcomm offers its PureVoice SDK which includes a free player for QCP files. However, this software is long outdated and not suitable for everyday use. I have to admit that today the QCP format is hardly playable on a computer. With the development of smartphones, processor power and storage space are becoming cheaper, high-quality audio formats such as MP3, AAC are used for ringtone playback and sound recording, and low-quality format QCP is disappearing from mobile platforms. If you have important recordings from older mobile devices, the only way to listen to them is to convert them to another audio format, such as MP3. Frankly speaking, any modern format will do, since its quality is certainly better than QCP's.
Why do I choose MP3 as the output format? Probably because it is the most common format today, supported by thousands of different devices. After the expiry of the patents, this format is completely free. At the same time, it provides acceptable quality even for low bitrates. An MP3 file at 128 kbps will be about one-tenth the size of the original CD quality file.
The choice of converters for the QCP format is not so great, so it is not difficult to find a suitable tool. Considering the above, the quality of the conversion will not be decisive. Choose the one that supports as many formats as possible so you don't have to pay twice. I think Audio Converter Plus might be the right tool for you because it has the ability to convert QCP to MP3 with high speed. In addition, it can convert various audio files to other popular audio formats to meet your needs as much as possible. Give it a chance, download the trial version of the converter from our website right now.
1 Starting the converter and adding files
Double-click the icon on desktop and you will see the main window woth conversion queue. Click the "Add File" button to select the QCP audio files you want to convert or drag and drop the QCP files from Windows Explorer. To add all files from a folder, drag it onto the program window or use the "Add Folder" button
2 Configuring the MP3 encoder
Select MP3 Encoder from the drop-down list of formats. Then click on "Encoder Options" and adjust the encoder. I don't think anyone can be tempted by old ringtones, so we'll focus on voice recordings when choosing settings. Conversion cannot improve the quality of recordings simply by choosing higher bitrates, so we can limit ourselves to 64 or even 32 bps.
3 Setting additional parameters
I am sure that the recordings made on an old phone can be very different in volume, so I recommend that you turn on the automatic volume normalization in the converter settings.
4 Start converting QCP files
Click the "Convert" button to start converting all QCP files in queue to MP3. Despite high compression rates, decoding is much faster than encoding. Audio Converter Plus will complete the task quickly enough due to good optimization for multi-core processors.
5 Summary
Admit it, are you surprised by what you heard? The quality of recordings, which ten years ago was considered acceptable, today could be considered terrible. Perhaps some of you will feel nostalgic hearing voices from the past. In any case, it was my task to show you how to bring these recordings back to life.