Failed to convert array Test1.WAV to "Test1.WAV" to playable in Teensy Wav player object !!

[charnjit]

i have some mixed types of files on SD card ( .wav .mid .jpeg .txt)
i wrote code to store audio files names to array. i don't know how many file are in sd root . i took

#define MAX_FILES  256
String filenames[MAX_FILES];

i guess these are not more than 256.
then i function in void setup

   for (int i = 0; i < MAX_FILES; i++)    {     READ_SD_FILE_NAME ();   }

the function

  READ_SD_FILE_NAME ();

have

            void READ_SD_FILE_NAME ()  { 
                 { File root = SD.open("/"); // Open the root directory
  if (root) {
    while (true)  {
      File entry = root.openNextFile();
      if (!entry) {
        // No more files
        break;
      }
      if (!entry.isDirectory()) {     // Only store actual files, not directories
        if (fileCount < MAX_FILES) { // Ensure you don't exceed array bounds
            String filename = entry.name();
          if (filename.endsWith(".WAV") || filename.endsWith(".wav")) 
       {    filenames[fileCount] = filename;
          filenames[fileCount].toUpperCase(); // Convert to uppercase for case-insensitive comparison
          fileCount++;   }
        }
      }
      entry.close();
      }
    root.close();
  }           
  else {
    Serial.println("Error opening root directory From SD Card");
  }
  }   
            }

now

  filenames[fileCount]

is became Test1.WAV . i can see it in Serial Monitor

   Serial.println(filenames[fileCount]);

but it cannot be used in

 playSdWav1.playWav(filenames[fileCount]);

getting error

no matching function for call to 'AudioPlaySdResmp::playWav(String&)'

as

 playSdWav1.playWav();

function use

"Test1.WAV"

file name with inverted comas instead of

Test1.WAV

please reply ... How to convert

 filenames[fileCount]

into useable audio file name . how to use it in

 playSdWav1.playWav(filenames[fileCount]);

????????????????????
Thank you

 

[jmarsh]

Post the entire code. We can't see what object playSdWav1 is or what the function definition of the playWav() function is.

 

[MarkT]

8.3 filenames are uppercase only, maybe that's it?

 

[jmarsh]

I suspect it's because OP is trying to pass a String to a function expecting char* but the crystal ball is foggy.

 

[ihatemornings]

This seems likely! From the error it looks like we’re calling the teensy-variable-playback library, and `playWav` takes a `const char*` filename. So I’d try this for a start (convert the `String` to a C-style char array):

playSdWav1.playWav(filenames[fileCount].c_str())

 

[charnjit]

thank you all of you to reply .
thank you "ihatemorings'' your code start working

playSdWav1.playWav(filenames[fileCount].c_str())

i modify my code for reading file names to array

void printFiles(File dir) {
  while (true) {
    File entry =  dir.openNextFile();
    if (! entry) {
      // no more files
      break;
    }
    Serial.print(entry.name());   
                                  //start my code
             String filename = entry.name();
              filename.toUpperCase();   
        if (filename.endsWith(".WAV"))  {
       filenames[fileCount] = filename;   
           fileCount++;     
  }             //end my code
    if (entry.isDirectory()) {
      Serial.println("/");
    } else {
      // files have sizes, directories do not
      Serial.print("\t\t");
      Serial.println(entry.size(), DEC);
    }
    entry.close();
  }
}

then i call it in

playSdWav1.playWav(filenames[fileCount].c_str());

yes it is working ...
again thanks to all seniors....