Wednesday, November 7, 2007

How to record sound with the Palm with the highest quality

Some like the Palm Treo, the LifeDrive, or even the T5 or TX with an external microphone, can record audio without much problem, using the sound recorder program that gives Palm, Voice Notes. However, this program is intended only to record voice, and in addition to the resulting file occupies as little as possible: it uses a sampling frequency of phone conversation (ie, very low quality) and a compression format at a loss.

La Palm puede hacer muy bien la función de grabadora de sonido
The Palm can do very well the role of sound recorder

However, the quality of the microphone of the Palm is pretty good at hardware, so it's a penalty miss when we want to record something with more fidelity, for example to make a podcast or an interview. And the programs available for recording audio quality than the Palm are all for payment, and also expensive. This is what I thought the creator of Better Recorder, a free program to record audio through a microphone from the Palm.

Better Recorder records the audio in RAW format, with no compression. Ie, 16-bit PCM to 44,100 Hz, such as a CD. Like CDs, which store 650MB in 74 minutes, the resulting file will be very big. In fact half of that in a large CD, as recorded in mono instead of stereo (the hardware does not allow stereo recording). The sampling rate can be reduced if we need to create smaller files, or just our PDA is not fast enough to store the recording data are generated according to (the solution may be to buy a high-speed SD card).

The program is very simple to use: simply choose the sampling frequency of a list, and start and stop recording by pressing a button that appears on the program window, or clicking on any of the physical buttons on the Palm. During recording two graphs show will be drawn where the wave form. Looking at these pictures we can know when we saturating the microphone and therefore we have to remove the Palm of the origin of the sound to prevent degradation of quality: the sound is saturating the microphone when the wave touches the top of the chart, ie is more intense than the maximum value that the microphone is capable of recording, so the wave will be cut by up, and then there will be new frequencies that distort the sound.

El overdrive es un efecto útil en la música techno pero no en una grabadora
The overdrive is a useful effect in the techno music but not in a tape recorder

The recordings are saved in WAV format in the folder / records / of the SD card. Every time I start a recording, it creates a new file. The program does not include a per WAV player for simplicity, but any audio player that we have installed you can play it without problems, for example TCPMP.

As I said before, Better Recorder is free, so it can be downloaded from its SourceForge page in both the program itself as the source.


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