Here is the complete list of all command line utilities included in the present
package:

gsm-amr2efr		See AMR-EFR-conversion article.
gsm-efr2amr

gsmefr-cod-parse	See EFR-testing article.
gsmefr-dec-parse

gsmefr-decode		See Codec-utils article.
gsmefr-encode

gsmefr-etsi-dec		See EFR-testing article.
gsmefr-etsi-enc

gsmefr-rec2etsi		This program reads an EFR session recording in gsmx
			format and converts it into ETSI decoder input (.dec)
			format.  It was written early in the project as a sanity
			check, to verify that the format of TCH uplink from
			sysmoBTS in EFR mode matches our expectations, before
			embarking on the labor-intensive project to librify EFR
			reference code from ETSI.

gsmfr-cvt-dlcap		See Calypso-TCH-downlink article.

gsmfr-decode		See Codec-utils article.
gsmfr-encode

gsmfr-hand-test		This program was written as part of a debug chase:
			there seemed to be a design flaw in libgsmfrp, but the
			actual bug turned out to be in the way we patched
			osmo-bts-sysmo to produce a continuous RTP stream.

gsmfr-max-out		Another test program written as part of the same debug
			chase.

gsmfr-preproc		This program reads a gsmx file in FR codec format,
			passes it through our Rx DTX preprocessor (libgsmfrp),
			and writes the preprocessor output to another .gsm file.

gsmrec-dump		See Binary-file-format article.

rtp-gsmfr-extr		See RTP-analysis article.