Instead of working with hundred thousend of soundfiles use Soundfile-Segments

The most fundamental feature of S_TOOLs-STx has to be made aware to the user. STx processes the audio signals in soundfile documents as a whole, such as originally recorded. The soundfiles are frozen as originals, in the sense of a secure database, whereas the associated metadata are treated dynamically and therefore free to be updated if necessary.

In order to access and process individual sound events conveniently, such as phonemes, words, traffic noise evets, animal sounds etc. on a soundfile basis, an open concept of Soundfile segment definition and annotation on the metadata level has been implemented. It imposes no restrictions in access to the sound whatever, but opens the option of multiple annotations to the same sounds if necessary, preserves the original context of the recordings, enables relative addressing and avoids the cumbersome management of hundreds of thousands of individual sound files in dedicated data bases.

The Concept of Soundfile-Segments

Assume your soundfiles contain recorded music or interviews with phonetically balanced text, or different environmental sounds of noise, machinery noise or animal sounds recorded unattended under free field conditions by automated monitoring systems. Recordings of this type usually have a duration of several hours and frequently much more (up to weeks), depending on the recording sessions arranged. In general, the principal goal consists in collecting as much as relevant audio information on the subjects under consideration as possible. By accessing the recorded sound material the immediate problem of segmentation arises. Phonetically balanced text has to be transcribed and annotated to the word and phoneme level, environmental sounds have to be identified as events and described accordingly as well as longterm monitoring recordings of animal sounds. Usually for each segment a new soundfile would be created in order to access the sounds. S_TOOLS-STx adopts instead the strategy to create segment identification and soundfile addresses (soundfile name, start sample, length in samples and additional metadata), providing a unique reference for each sound segment. The advantages of the concept described are:

Sample address specifications for segment definition in S_TOOLS-STx 

User-defined Attribute

You can add attributes to any DataSet element by editing the properties of the selected element. Attributes not automatically set by S_TOOLS-STx are called 'user-defined' attributes. Set an attribute in the bottom edit box with the format songLyric=God save our gracious Queen; and delete it by assigning no value (e.g. songLyric=;).

In order to see user-defined attributes in the Detail, press the Attr button [] to search for element attributes.

If you need to edit the user-defined attributes often, you might like to try developing a segment template to facilitate data entry.

You can copy a DataSet element's attributes by right-clicking on the attribute and selecting Copy Attributes. A selection of the following will be available, depending the element type:

Segment-ID must be unique / each soundfile start_end in samples (Fs=44100Hz) equivalent to: equivalent to : equivalent to:
myfirstsegment 0_88200 0s_2s myfirstsegment:b_myfirstsegment:e myfirstsegment:b_myfirstsegment:b+l
my2ndsegment myfirstsegment:e_+2s 2s_4s    
Note: numerical expressions are allowed in segment addressing "b" stands for begin of a segmernt
"e" for the end of a segment
"l" for the length (duration).

address expressions are always evaluated in samples, independent wether specified in s, samples or other units of time. 

Note the "_" is used to separate from_to in order to remain reserved +/-* for address expressions.

Go to → Home Free Download StartUp Create a Spectrogram Spectrogram Configuration Working with Segments

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