WaveSurfer-WP filters exemples. Required v2.6.

waveSurfer-wp-filters-exemples.php

<?php

/**
 * Plugin Name: WaveSurfer-WP Custom Functions
 * Description: Custom functions for WaveSurfer-WP
 */

//------------------------------- CONDITIONAL SHORTCODE ATTRIBUTES -------------------------------------

// Add shortcode attributes
add_filter( 'wavesurfer_wp_shortcode_attributes', 'add_data_shortcodes_attributes', 10, 2 );

function add_data_shortcodes_attributes( $attr, $player ) {

  if ( $player === 'audio' || $player === 'playlist' ) { // Choose both, or erase conditions if not needed. You can also write your own, based on page ID, post type etc... 
    $attr['loop_button'] = 'true'; // This will add loop button. See WaveSurfer-WP WordPress doc for list of all attributes.
    $attr['download_button'] = 'true'; // This will add download button. See WaveSurfer-WP WordPress doc for list of all attributes.
  }

  return $attr;

}

//-------------------------------- ADDITIONAL DATA ON MARKUP --------------------------------------------

// Add waveform custom data attribute
add_filter( 'wavesurfer_wp_shortcode_data', 'add_data_shortcodes_infos', 10, 3 );

function add_data_shortcodes_infos( $empty, $link, $split ) {
  // Add conditions if needed.
  
  $value = 'value';
  return ' data-attribute="' . $value . '"';

}