System requirements.

In order to run rtty-2.0 in your computer you will need at least:

• An Intel Pentium or compatible processor. The program requires very little CPU power. In a 166 MHz Pentium it consumes only a 5% CPU time with a sampling rate of 44100 Hz. With lower sampling rates (11025 Hz is the recommended minimum) the CPU use is negligible. This suggest that the program can run in older computers, but this was not tested. Anyway, a hardware FPU is needed.
• A sound-card. Tested sound-cards are SoundBlaster-16 and SiS-7018 AC'97. The first one is an old card and has an stable driver. The SiS-7018 is embedded in a laptop chipset. Its driver is still buggy.
• Linux Operating System. Of course.
• A sound-card driver. This driver can be compiled into the linux kernel or can be inserted as a module. As previously stated, some drivers are buggy or lack some functionality. The SiS-7018 driver only allows recording at 48 KHz sampling rate, and some ``ioctl'' calls are not implemented. As a result, the oscilloscope window shows a poor animation.
• An X-window server for the graphical interface.
• An ANSI color terminal for the decoded output.