Narayan,If you or a colleague are familiar with Praat, you can use this Praat script to generate variations of your stimuli where there are manipulations of the pitch contour and the duration. You'll end up with your original sound, an versions where the pitch went up or down (three different pitch contours) and for each of those, a version with the original duration, as well as a shortened duration and lengthened duration. So 9 sounds total from each original sound you have.The variables should be clear from the top of the script. As is the case for any Praat manipulation, your new sounds will be temp objects, not saved files. You can save them with another script that does batch processing. But anyway, this kind of procedure might serve your needs. It works on a PC, not sure about a Mac.Matt# Enter your sound directory here, within double quotes:sound_dir$ = "C:\consonants"# select your manipulations (these are multipliers of the pitch contour and duration)pitch_up = 1.15pitch_down = 0.85duration_up = 1.2duration_down = 0.8# clear the info windowclearinfo# list all the files in the folderCreate Strings as file list: "fileList", "'sound_dir$'\*.wav"num_files = Get number of strings# loop through the filesfor index from 1 to num_filesselect Strings fileListfilename$ = Get string: indexname$ = "'filename$'" - ".wav"name$ = "'filename$'" - ".WAV"Read from file: "'sound_dir$'\'filename$'"# make a manipulation object using some default pitch analysis parametersTo Manipulation: 0.01, 75, 600# create various pitch tiersExtract pitch tierCopy: "'name$'_p2"Copy: "'name$'_p1"Multiply frequencies: 0, 1000, pitch_downselect PitchTier 'name$'Copy: "'name$'_p3"Multiply frequencies: 0, 1000, pitch_up# create various duration tiersselect Manipulation 'name$'Extract duration tierCopy: "'name$'_d2"Copy: "'name$'_d1"Add point: 0, duration_downselect DurationTier 'name$'_d2Copy: "'name$'_d3"Add point: 0, duration_upfor p_index from 1 to 3for d_index from 1 to 3select Manipulation 'name$'plus PitchTier 'name$'_p'p_index'Replace pitch tierselect Manipulation 'name$'plus DurationTier 'name$'_d'd_index'Replace duration tierselect Manipulation 'name$'Get resynthesis (overlap-add)Rename: "'name$'_p'p_index'_d'd_index'
"endforendfor# cleanupselectObject: "Sound 'name$'"plusObject: "Manipulation 'name$'"plusObject: "PitchTier 'name$'"plusObject: "PitchTier 'name$'_p2"plusObject: "PitchTier 'name$'_p1"plusObject: "PitchTier 'name$'_p3"plusObject: "DurationTier 'name$'"plusObject: "DurationTier 'name$'_d2"plusObject: "DurationTier 'name$'_d1"plusObject: "DurationTier 'name$'_d3"Removeprint finished with file: 'name$''newline$'#pause finished with file: 'name$'endfor------------------------------ ------------------------------ --Matthew Winn, Au.D., Ph.D.
Dept. of Speech & Hearing Sciences
University of WashingtonOn Tue, Oct 4, 2016 at 9:55 AM, Narayan Sankaran <Narayan_Sankaran@xxxxxxxxxxx> wrote:
I’m looking for help in finding a corpus of VCV nonsense syllables. I’m examining the cortical representation of consonants (using EEG) and want capture some invariance to acoustic variability. More so than presenting multiple talkers, I am looking for multiple repeat utterances of the same VCV within the same talker (not only different vowel contexts, but the exact VCV uttered at different rates and with as much variability in prosodic features as possible). Does anyone on this list knows of such a corpus? Many thanks in advance.
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