Embedded Files
AudioTutorial_forWebsite.pptxAudio recording tutorial
Audio recording tutorial
Covers information about audio equipment (e.g., types of microphones), calibrating sound with sound level meter, and trouble-shooting common problems.
(Liz Heller Murray, 2020)
Audapter
Audapter
"Audapter", previously known as "TransShiftMex", is a MATLAB-based software package for configurable, real-time manipulation of speech signals. It is designed for research on auditory-motor interaction in speech production, but may also be of interest to certain speech signal processing applications. Audapter is currently capable of perturbing the following acoustic parameters of speech:
Formant frequencies (F1 and F2), in both static and time-varying ways
Fundamental frequency (F0)
Local timing, through real-time tracking and time-warping
Local intensity
Global time delay (delayed auditory feedback)
Global intensity
The following links are a good place to start to learn about Audapter.
Official Audapter Documentation
Official Audapter Documentation
TransShiftMex-Manual-New.pdfTransShiftMex manual (Shanqing Cai, 2009)
Audapter manual 2.1.012
(Shanqing Cai, 2014)
AudapterManual_2.1.5.pdfAudapter Manual 2.1.5
Additional Audapter Documentation
Additional Audapter Documentation
AudapterInformationAdditional Audapter info (Liz Heller Murray, 2020)
Audapter_Installation_Manual.docxInstallation manual (Frank Guenther, 2021)
PitchMethods.pptxPitch-shift methods (Alfonso Nieto-Castañón, 2020)
Recommended reading
Recommended reading
Kim, K. S., Wang, H., & Max, L. (2020). It’s about time: Minimizing hardware and software latencies in speech research with real-time auditory feedback. Journal of Speech, Language, and Hearing Research, 1-13. https://doi.org/10.1044/2020_JSLHR-19-00419
Detailed discussion on Audapter software latencies, audio hardware latencies, and suggestions of how to measure the total latency (hardware + software) in your own experimental setup
Švec, J. G., & Granqvist, S. (2018). Tutorial and guidelines on measurement of sound pressure level in voice and speech. Journal of Speech, Language, and Hearing Research, 61(3), 441-461. https://doi.org/10.1044/2017_JSLHR-S-17-0095
Excellent tutorial on sound pressure level measurement (used in our lab to calibrate the dB SPL between the recorded microphone signal and auditory-feedback played through headphones; also important if measuring dB SPL as part of experiment)
Švec, J. G., & Granqvist, S. (2010). Guidelines for selecting microphones for human voice production research. American Journal of Speech-Language Pathology. https://doi.org/10.1044/1058-0360(2010/09-0091)
Tutorial on many factors to consider when choosing a microphone for speech/voice research; provides good information for quality recording practices (e.g., making an informed decision about mic-mouth distance, min SNR)
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