Large volume level difference between tones via headphones

[Shaolin]

Hi there. Trying to understand if this is a normal thing or if I may have a detective unit. My Casio CT-S1 plays different tones via speakers with quite similar volume level as expected. However when I plug headphones (I've tried several), some tones are at "normal" volume at mid level of the volume knob (I.e. piano, organ) while some are very low (I.e. flute/mellotron). To the point where if I turn volume to the max with the flute it's still less that what I would like. Anyone else experiencing something similar? Thanks.

 

 

 

[Brad Saucier]

What type of headphones are you using?

[Shaolin]

1 hour ago, Brad Saucier said:

What type of headphones are you using?

Thanks for checking Brad. I've actually used a few different ones to rule out that it was a faulty one. I've also tried today with an external speaker that takes audio in via mini Jack and the issue remains. I'm more and more inclined to think it's a defect since when I see demo videos in YouTube that are recorded via the headphone jack I don't notice significant volume different as they loop through different sounds.

[Brad Saucier]

Can you record an audio file from the headphone jack and post here?  

[Shaolin]

1 minute ago, Brad Saucier said:

Can you record an audio file from the headphone jack and post here?  

I've actually recorded a small video, hopefully you can access.

 

https://www.dropbox.com/s/q52iljl8gdak57y/20220927_122405_1.mp4?dl=0

[Brad Saucier]

Ahh yes, something sounds faulty in the headphone connection.  Since you've tried multiple headphones known to be functional, I would contact the seller for help.  They may offer a replacement.  

[Shaolin]

On 9/27/2022 at 7:06 PM, Brad Saucier said:

Ahh yes, something sounds faulty in the headphone connection.  Since you've tried multiple headphones known to be functional, I would contact the seller for help.  They may offer a replacement.  

Yeah thanks. Claim placed to Gearmusic. I received the product this week and got their extra warranty so hoping for a smooth process:)

 

Btw seems that as a newbie you can only reply a few times within 24h, that's why I didn't write earlier. Thanks again.

[Bill the Baxman]

I just got a CT-S1 and I have this symptom too.  What I observe is that like many commonly available headphones, mine have a TRRS connector because the headphones have a built-in microphone.   If I fiddle with the jack and pull it partway out, I can get to a spot where the sound is a normal volume.  And if I use a pair of TRS headphones without mic support, then volume sounds normal.  Not sure if this is a defect in the connector or just the way it was designed.

[Brad Saucier]

The keyboard is designed for a TRS stereo plug.  TRRS headphones with built-in mics are not recommended.  

[Bill the Baxman]

On 9/27/2022 at 9:11 AM, Shaolin said:

I've actually recorded a small video, hopefully you can access.

 

https://www.dropbox.com/s/q52iljl8gdak57y/20220927_122405_1.mp4?dl=0

 

It's hard to see but I found one frame in this video where it looks pretty clear that the little speaker being connected has a TRRS connector.  I guess it's a little videoconferencing speaker with a built-in mic?  Anyway I think that's why the volume is low for some patches.  Like Brad says, apparently the CT-S1 only works right with a TRS connector.