For hydrophone audio data products only (MP3, FLAC, WAV formats)
Note: This option is overridden to the "Yes" option if the Audio Downsampling option is any value other than "None".
No
This option will cause the search to return only the data that is in the archive and no on-the-fly format conversion will occur. This saves a tremendous amount of computing time compared to the yes option. The search will normally return in 5-10 seconds, perhaps 30 seconds. The primary storage and source format for hydrophones changed from wav audio files to FLAC audio files on August 10, 2020 with some overlap where both formats were produced and archived, see the note on the audio data product page for more information. Some MP3 files were also archived for 2006 to 2012 (not the source format). The primary benefit of the "no" option is that users can quickly download both source formats (wav and FLAC) with two search requests, one for wav and one for FLAC acquiring all the data quickly without waiting for conversion. Most audio players and software accept both wav and FLAC as input without issue and converting from one format to another has no benefit. The No option will not be in effect if any downsampling is selected, as downsampling is an on-the-fly process, so might as well pull from all sources at that time. The no option is also not in effect for IOS Hydrophone Arrays as the source format for those devices is .hyd raw files which always have to be converted to audio on-the-fly.
This is the default option.
Oceans 3.0 API filter: dpo_audioFormatConversion=0
Yes
This option will cause the search to fill in any data files for the requested format that are not already in the archive with files generated on-the-fly, drawing from all source formats (wav, FLAC or hyd (IOS Hydrophone Arrays only)). For example, if a search for wav files is submitted for a year of hydrophone data in 2022 (after the source format was switched to FLAC), all of that data will be converted from the FLAC source files to wav format; this is 105,000 files, which will be about 5 TB on disk and will take about 20 days to process. If you need to convert to a specific format, please limit the search range to one day at a time, as this creates roughly 10 GB of data and takes about 1 hour to process. Making smaller, repeated search requests is best done using the Oceans 3.0 API. It is recommended to test out a small request first before making larger requests.
Oceans 3.0 API filter: dpo_audioFormatConversion=1
File-name mode field
No changes.