Baudline

baudline

Baudline Signal Analyzer
Developer(s)	SigBlips DSP Engineering
Initial release	September 2000
Stable release	1.08 (Jul 21, 2010) [±]
Preview release	Non [±]
Written in	C[1]
Operating system	FreeBSD,[2] Linux,[3] OS X, Solaris
Type	numerical analysis
License	Binary: proprietary;[4] Source code: proprietary[1]
Website	www.baudline.com

The baudline time-frequency browser is a signal analysis tool designed for scientific visualization. It runs on several Unix-like operating systems under the X Window System. Baudline is useful for real-time spectral monitoring, collected signals analysis, generating test signals, making distortion measurements, and playing back audio files.

Applications

• Acoustic cryptanalysis ^{[5][6][7][8][9]}
• Audio codec lossy compression analysis ^[10][11]
• Audio signal processing
• Bioacoustics research
• Data acquisition (DAQ)
• Infrasound monitoring
• Musical acoustics ^[12][13][14]
• Seismic data processing
• SETI ^[15][16][17]
• Signal analysis
• Software Defined Radio ^[18][19]
• Spectral analysis
• Very low frequency (VLF) reception^[20]
• WWV frequency measurement ^[21][22]

Features

• Spectrogram, Spectrum, Waveform, and Histogram displays
• Fourier, Correlation, and Raster transforms
• SNR, THD, SINAD, ENOB, SFDR distortion measurements
• Channel equalization
• Function generator
• Digital down converter
• Audio playing with real-time DSP effects like speed control, pitch scaling, frequency shifting, matrix surround panning, filtering, and digital gain boost
• Audio recording of multiple channels
• JACK Audio Connection Kit sound server support^[23]
• Import AIFF, AU, WAV, FLAC, MP3, Ogg Vorbis, AVI, MOV, and other file formats

License

Baudline binaries are available for free download.^[4] The binaries may be used for any purpose, though no form of redistribution is permitted.^[24] Source code is available for purchase under a number of licenses.^[1] While the Baudline website states that the source code is dual-licensed, under both a proprietary license and a version of the GNU General Public License, no source code released under this dual-license is made available for download on the software's website nor has been shown to exist elsewhere.^[25]

See also

• Linux audio software
• List of information graphics software
• List of numerical analysis software
• Digital signal processing

References

1. "Source code". Baudline. SigBlips DSP Engineering. Retrieved 22 May 2010.
2. "FreshPorts -- audio/baudline". DVL Software Limited. Archived from the original on 18 May 2010. Retrieved 22 May 2010.
3. "Linux Online - Application: baudline". Linux Online, Inc. Retrieved 22 May 2010.
4. "Download". Baudline. SigBlips DSP Engineering. Retrieved 12 May 2015.
5. "Acoustic cryptanalysis:On nosy people and noisy machines". Adi Shamir, Eran Tromer. Retrieved 22 May 2010.
6. "Acoustic Surveillance of Physically Unmodified PCs" (PDF). Michael LeMay, Jack Tan. Retrieved 22 May 2010.
7. "2IF03 – Seminar IST Overview of Acoustic Side Channel Attacks" (PDF). Jan de Muijnck-Hughes. Retrieved 17 February 2010.
8. "Compromising Electromagnetic Emanations of Wired and Wireless Keyboards" (PDF). Martin Vuagnoux, Sylvain Pasini. Retrieved 22 May 2010.
9. "EM-Sniffing" (PDF). Oswald Berthold. Archived from the original (PDF) on November 27, 2011. Retrieved 22 May 2010.
10. "Audio Compression Codecs". E. Olson. Retrieved 22 May 2010.
11. "Ogg Vorbis and MP3 Audio Stream charecterization" (PDF). Ayman Ammoura Franco Carlacci. Retrieved 22 May 2010.
12. "Analyse van de zangstem : geluiden in beeld" (PDF). Koen Eneman, Tom Francart. Retrieved 22 May 2010.
13. "Improving the Aesthetic Quality of Realtime Motion Data Sonification". Christoph Henkelmann. CiteSeerX: 10.1.1.67.3546.
14. "Analizador de un espectro musical" (PDF). Andrés Jiménez Sánchez, Amaia de Miguel Morate, Javier Villellas Bernal. Retrieved 22 May 2010.
15. "setiQuest Kepler-Exo4 1420 MHz". baudline. Archived from the original on 18 May 2010. Retrieved 23 May 2010.
16. "SETI and Kepler-4b". exoplanetology.com. Retrieved 23 May 2010.
17. "Exoplanetology Kepler 4b and SETI". portaltotheuniverse.org. Archived from the original on 13 May 2010. Retrieved 23 May 2010.
18. "My First Software Defined Radio (SDR) Receiver - 2nd Section Downconverter". Juan Domenech Fernandez. Retrieved 22 May 2010.
19. "GNU Radio ist ein freies Toolkit fuer Software Defined Radio". Chaos Computer Club Berlin. Retrieved 22 May 2010.
20. "Segnali radio a bassissima frequenza (VLF)". Tito Dal Canton. Retrieved 22 May 2010.
21. "Techniques for Measuring Frequency Off-the-Air". John Ackermann. Retrieved 22 May 2010.
22. "Using Baudline for Frequency Measurement". John Ackermann. Retrieved 22 May 2010.
23. "FFT visualizing : Ardour". Paul Davis. Retrieved 22 May 2010.
24. "Baudline FAQ". Baudline. SigBlips DSP Engineering.
25. "ITP: baudline -- time-frequency browser designed for spectral visualisation" (#784771). Debian Bug Tracking System. The Debian Project. Retrieved 12th May 2015.

External links

• Baudline Home Page
• User discussion group at Google Groups
• SigBlips DSP Engineering