My apologies; wavfile_source does not inherit from file_source, so my answer does not apply.
--- Jim Melton From: Jim Melton Sent: Monday, February 13, 2023 10:23 To: 'discuss-gnuradio@gnu.org' <discuss-gnuradio@gnu.org> Subject: RE: [EXTERNAL] Wav source: playing speed and playing startup instant I would add that “playback speed” will be determined either by upstream blocks, or a Throttle block that you add after the file. --- Jim Melton From: Jim Melton Sent: Monday, February 13, 2023 10:20 To: discuss-gnuradio@gnu.org<mailto:discuss-gnuradio@gnu.org> Subject: RE: [EXTERNAL] Wav source: playing speed and playing startup instant If your question is how to subset the file, see https://wiki.gnuradio.org/index.php/File_Source Offset and Length parameters. If your question is how to use a GUI slider to accomplish this, I’ll defer to others. --- Jim Melton From: discuss-gnuradio-bounces+jim.melton=sncorp....@gnu.org<mailto:discuss-gnuradio-bounces+jim.melton=sncorp....@gnu.org> <discuss-gnuradio-bounces+jim.melton=sncorp....@gnu.org<mailto:discuss-gnuradio-bounces+jim.melton=sncorp....@gnu.org>> On Behalf Of Giovanni Parodi Sent: Monday, February 13, 2023 06:00 To: discuss-gnuradio@gnu.org<mailto:discuss-gnuradio@gnu.org> Subject: [EXTERNAL] Wav source: playing speed and playing startup instant Good morning, I'm a gnuradio beginner, and I'm trying to better understand some topics related to source and sink. I implemented a very easy SW that allows me selecting a file from filesystem and then I provide the filename to the C++ source implementation, by calling the function: blocks::wavfile_source::make The implementation works fine, but I have an issue. Since sometimes I need to perform audio analysis on files that are quite long, I would like to have a way to use something like a timeslider to move on a specific time instant on the wav file, or at least to change playing speed of file. I found no property (looking both in C++ and Python generated code) to achieve this target. Is there any way to perform this operation? Best regards CONFIDENTIALITY NOTICE - SNC EMAIL: This email and any attachments are confidential, may contain proprietary, protected, or export controlled information, and are intended for the use of the intended recipients only. Any review, reliance, distribution, disclosure, or forwarding of this email and/or attachments outside of Sierra Nevada Corporation (SNC) without express written approval of the sender, except to the extent required to further properly approved SNC business purposes, is strictly prohibited. If you are not the intended recipient of this email, please notify the sender immediately, and delete all copies without reading, printing, or saving in any manner. --- Thank You.
