Numark NV and NVII - My NV screens are not displaying wave forms. What should I do?

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numark nv displayscreenv2If your music files have not been analyzed in Serato prior to connecting your NV, your NV screens may not display the wave forms.  Before you play music in Serato DJ, you should be sure that your music files have been analyzed, and that they are a supported file type.  The Analyze Files function helps detect file corruption, builds and saves waveform overviews, and calculates auto-gain and BPM values.  The following guide will walk you though how to analyze your files in Serato DJ.

  • If your NV screen is not displaying wave forms for many or all files in your library, it is likely due to your files not being analyzed.
  • If your NV screen is not displaying wave forms for only a few in your library, it is likely due to files that are corrupted, or that are an unsupported file type.  For a list of supported file types to use in Serato, review this article here.  

We'll walk through analyzing your files, dealing with corrupt & unsupported files in article below.


  1. Before you begin
  2. How to Analyze and Prepare Files for Serato
  3. Corrupt Files - Everything You Need to Know
  4. Further Technical Support



Before You Begin

Many issues can be resolved by updating your software.  Before you proceed with additional troubleshooting, make sure you're running the latest version of Serato DJ.



How to Analyze and Prepare Files for Serato

  1. To analyze files in Serato DJ, please run your Serato software in offline mode (with the NV USB cable disconnected from your hardware).  

    numark nv offlinemode

  2. Check off both Set Beat Grid and Set Auto BPM prior to analyzing your files.  We recommend leaving your Range at None.

    numark nv setbeatgridsetautobpm

  3. Highlight the song that you wish to analyze. 

    numark nv selectsongs

  4. You could click the Analyze Files button to start the process or simply drag and drop your highlighted songs onto the Analyze Files button.

    numark nv analyzefilesbutton

  5. Wait until this has finished analyzing all of your songs.  When complete, your Analyze Files button will become un-highlighted.  

    numark nv selectsongs

Note: The auto BPM function will not be applied if the track already contains BPM information.  If after analyzing the songs, you know the current BPM information was analyzed wrong on a particular track, double click on the BPM tag for the track and delete the BPM value before re-analyzing.  To re-analyze these files and calculate an auto BPM or auto gain value, simply drag and drop them onto the Analyze Files button.

If you are unable to complete the analyzing of your files, see Serato's article Troubleshooting freezing and crashing while Analyzing Files for further assistance.  


Corrupt Files - Everything You Need to Know numark nv seratocorruptfiles

If a corrupt file is detected while your analyzing your files, your Serato software will tag the track with a corrupt file icon.  It is important that you delete ANY corrupt files from your library as they can cause the software to crash regardless if you play the file or not.  Also, if your using an external hard drive or thumb drive, please delete these files from your Serato database.  Keep in mind that when your using an external hard drive or thumb drive, your files may need to be re-analyzed each time before using your NV.   

To delete a song from your Serato library, navigate to your ALL section.  Click on the song to select it and use the keyboard shortcut Control + Delete for PC users or Command + Delete for Mac users to delete the song (make sure the Protect Library option in Serato's setup is turned off).

If you have a corrupt file in your library, you'll notice the lightning bolt icon on the left of your track numark nv seratocorruptfiles.  For information on supported Serato DJ file types, click here.  For further information about the specific corruption types and unsupported files, read below.


Corrupt File Error Messages in Serato

  • Corrupt file: This MP3 contains invalid frames.
    • This MP3 contains frames which do not conform strictly to the official MP3 specification. The software can not be certain that this file will play back 100% accurately.
  • Corrupt file: This file contains corrupt frames that may result in audible glitches.
    • This file contains two or more contiguous corrupt frames. Since corrupt frames are replaced with silence, this could result in what might sound like an audio glitch.
  • Corrupt file: This file has been split. You should check the beginning for audio glitches.
    • The first MPEG audio frame in this file refers to audio that should be present before it but is not. This is usually the result of incorrect MP3 editing. Since a corrupt frame is replaced with silence and most songs start with silence, the resulting silence might not be noticeable. All the same, listen to the beginning of the song, just to be sure.
  • Corrupt file: This MP3 contains frames with corrupt data.
    • Decoding of an MPEG audio frame failed. This means that the frame contained invalid data. As usual with corrupt frames, this frame will be played as silence.
  • Corrupt file: This MP3 lost synchronization between the frame index and the frames
    • The Serato software is reading an old overview of an MP3 that has been edited in a third party editing program. Re-building the overviews for the affected files usually corrects this error.
  • Corrupt file: This MP3 is completely invalid and is not playable.
    • Self explanatory. Possible causes are disk bad sectors, file system corruption, wrong file types, wrong file extensions, etc.
  • Corrupt file: This file contains invalid audio data.
    • The software encountered invalid data while looking for audio in this file. This message alerts you to the fact that the file you're trying to play contains corrupt data. This may, or may not, affect playback.
  • Corrupt file: This MP3 contains no valid frames.
    • No audio could be found in this file, which means it is completely unplayable as far as the software is concerned. Please make sure this really is an audio file.
  • Corrupt file: This WAV contains no valid chunks.

    • This WAV file contains no recognizable WAV data. It is quite possible that this might not be a WAV file.


Unsupported File Error Messages in Serato

  • Unsupported file: This MP3 contains multiple layers.
    • While scanning this file, the software found frames belonging to multiple MPEG layers. Serato software does not support MP3s containing frames from multiple layers – some frames may output as silence.
  • Unsupported file: This file is more than 2 GB in size.
    • Self explanatory. At the moment, Serato software does not support files that are 2 GB in size (or larger).
  • Unsupported file: This file has data blocks greater than 2 GB in size.
    • This file contains chunks of data that are larger than 2 GB. Serato software does not support files that are more than 2 GB in size.
  • Unsupported file: This file's data is not in PCM format.
    • WAV files can contain data in several formats. Serato software only supports WAV files that contain data in the PCM format.
  • Unsupported file: This file has a sampling rate greater than 48 kHz.
    • Serato software does not support sampling rates greater than 48 kHz. If you see this message, the simplest approach is to re-sample the audio at 48 kHz and re-save the file.
  • Unsupported file: This file uses more than 24 bits per sample

    • Serato software supports a maximum of 24 bits per sample of audio data.

Further Technical Support

Whether you are a customer or dealer, if you already own a Numark product, or if you just have pre-sales questions, the Numark technical support team is available to help!

Each product has a dedicated support page on the website where you can find manuals, specifications, software updates, drivers and troubleshooting guides:

Visit the link below to connect with any of the following support options: online community support, phone support, email support.


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