
      #include "ladspa-util.h"
      #include "gsm/gsm.h"
      #include "util/biquad.h"

      #define SCALE 32768.0f
      #define SCALE_R 0.0000305175f

      int bits[] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80};
    ]]>

GSM simulator

Encodes and decodes a signal using the GSM voice compression system. Has the effect of making the signal sound like it is being sent over a European mobile phone network.

src); free(plugin_data->dst); free(plugin_data->dry); free(plugin_data->blf); if (plugin_data->handle) { gsm_destroy(plugin_data->handle); } ]]> = 160 * resamp) { int i, j; gsm_signal *in; count = 0; dst[0] = dst[160]; dst[1] = dst[161]; dst[2] = dst[162]; in = src; for (j=0; jcount = count; *(plugin_data->latency) = 160 * resamp; ]]> Dry/wet mix

Controls the dry/wet mix, 0 will give you the dry signal (but with the appropriate amount of delay), 1 will give you a totally wet signal.

Number of passes

The number of times the signal is sent through the encode/decode process. Increases the CPU consumption almost linearly, and it will become more peaky so less friendly to realtime processing.

Error rate (bits/block)

The number of simulated bits that get changed during the transmission process.

I really wanted to reduce the bandwidth to get that {}"shouting down a drainpipe{}" effect, but I'm not sure how the reduced bandwidth is dealt with by real phones. I suspect it's heavily patented technology.

Input Output latency