Strange issue on DP-03SD - Hard reset?

[mariusvideo]

I''m experiencing a strange issue on my DP-03SD,
when use the onboard reverb on a track and stop playback the reverb reflection continue like normal but at the end I ear a ripetitive zzzzzzzzz like if it repeats rapidly the last part of the audio track played and stops after 4-5 seconds, is very annoing, hope is not a faulty unit.
I have tried to reset the unit by menu feature, re-charged the firmware but nothing,
do You know if is there an hard reset for this model?

You can listen the wav file of example here: https://filetransfer.io/data-package/QYsJh7LJ#link

And here another example: https://filetransfer.io/data-package/HUFU7lNQ#link

It happens only on tracks with audio recorded, not when record then in live.

 

[spantini]

My poor ears couldn't hear any zzzzzz or other unusual sound(s). These files sound like normal reverb tails to me.

 

[-mjk-]

Did not hear anything unusual. Also, the waveform looks clean in Reaper.

 

[mariusvideo]

Hello!
The problem is not an hum or interference but a fast repetition of a part of sound in the end of audio, if You listen with attention can ear a innatural fast repetition until the reverb reflection ends, It doesn't sounds like a natural reverb reflection (like before) but like an electronic repetition of a part of sound. I have amplified the part that I'm talking of and You can see the picture too.

The reverb effect works fine when used "live" before to record, but when a track in in playback,
when press STOP button produces this issue never heard before on my DP-03.

https://filetransfer.io/data-package/iShEpR6v#link

 

[spantini]

That's much better. I can hear it now. This does not sound like the reverb tail itself, but the crackling (sizzle) is breaking up the reverb tail making it sound like bad reverb - it's not, IMO. I cannot comment on the the source of your noise yet, it could be any one of several. Possibly a bad line cord.

It's time to begin a process of elimination with your hardware/software pieces. Remove each from the recording/playback chain one at a time, then replacing it before removing the next in order to narrow this down. Might just be a software setting.

 

[mariusvideo]

spantini,
this is recorded only with a microphone and the Tascam DP-03SD using the internal reverb effect not other

 

[mariusvideo]

UPDATE
I have done some experiments to understand if this issue was applied during playback then the mastering and It's Yes, the "noise" is generated too when the music ends and I ear the electronic sound for around 3-4 seconds after the music ends when I create the master, then is recorded to the end of the master file.
This happens only when I use the internal reverb, then I think the DSP chip or other
component may be compromised.

I'd like to know if someone has the same "problem" on DP-03SD.