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Post subject: Auxillary Input has background noise
Posted: Thu Aug 02, 2012 3:09 am
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Hi,
When I connect my MAC via phones out to the Aux In of the Mustang Mini, then I get loud noisy hissing. When I connect the IPod via the same 3,5 mm stereo jack cable the hissing is there too, but less. If I unplug the aux cable there is still some background hissing, but this depends on the activated preset.

Could you share your experience, if in general there is always background noise, or if the amp should be silent, when it is turned on without an input signal.


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Post subject: Re: Auxillary Input has background noise
Posted: Thu Aug 02, 2012 4:28 am
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This topic is similar.

viewtopic.php?f=27&t=72640

In brief, some of the amp models and effects introduce hiss; presumably as an accurate emulation of the original device being modelled.

However the power amp of the Mustangs also has some background hiss, which is a bit disappointing as there's no reason with current technology not to have a hi-fi quiet solid-state amp in there, even at the Mustangs' cheap prices. I concluded that Fender must have thought there was no need to, as guitar amps always traditionally had a bit of hiss so people would think it was normal, and also it's quieter than the hiss/noise from the amp and effects models.


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Post subject: Re: Auxillary Input has background noise
Posted: Thu Aug 02, 2012 11:02 am
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What are your experiences regarding the aux in? The regular hissing gets much louder when I connect the aux cable. Even when there is no input signal from the mp3 player.


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Post subject: Re: Auxillary Input has background noise
Posted: Thu Aug 02, 2012 5:15 pm
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Hi guys,

So, I just grabbed my smart phone and played some audio through a Fender Mustang IV here (Aux in). I did not hear any excess noise beyond the low level operational noise form the amp itself. Are you both speaking about noise that is introduced when you connect the Mac/iPod etc.? In other words, simply having the device connected without audio playing introduces additional noise to the amp? If you could clarify, that would be helpful. Also, has a second cable been tried? Thanks.

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Post subject: Re: Auxillary Input has background noise
Posted: Thu Aug 02, 2012 7:04 pm
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Well I am not sure I hear a lot of unusual noise. The first 7 seconds would be the typical noise level I have in mine. This is my playing to a MP3 on my Droid X2 running into the AUX with the mics in the Handy HD Zoom recorder jammed tight to the grill. The noise for the most part comes from running the master volume high on the amp rather than using the preset volume to control volume. With a digital amp I want run the master as low as I can with the patch volume as high as reasonable to balance with any other preset I am using. I then keep the master as low as I can to get the volume I need. I use the volume on the device (X2 here) to match the amp volume I want then (along with master if I need to move up or down some). The higher you jack the master the more white noise you amplify to audible levels.

http://youtu.be/o-EbqEJmP38


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Post subject: Re: Auxillary Input has background noise
Posted: Thu Aug 02, 2012 9:55 pm
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Yes, the noice starts when I simply connect, the aux cable. Even if there is no device (mac, mp3) connected on the other side. When the player is connected the changing of the volume of the device doesn't make any difference to the hiss. I have tried a different cable as well. I will go to my local music store today to test this with a different Mustang Mini.


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Post subject: Re: Auxillary Input has background noise
Posted: Fri Aug 03, 2012 9:15 am
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Hi MHSolar,

Thanks for the updated information. So, in regard to your first point, when you have a cable connected to the amp's Aux in and no device connected to the other end of the cable, you can expect to hear some noise, clicks and pops, etc. at times.

In regard to the overall question of noise in the amp and Aux in, it does not sound like the Aux in itself is causing a specific issue. My test yesterday included connecting a Droid Razr and streaming Pandora through the Aux in on the amp. I did not experience any elevated or additional noise beyond the nominal operating noise level of the amp. I hope this information helps. Please let me know if I can assist further.

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Post subject: Re: Auxillary Input has background noise
Posted: Fri Aug 03, 2012 9:46 am
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Thanks for all the aide, but I had been to my local music store today and tested another Mustang Mini. Sorry to say that, but the same issue araise (even tested different cables).
So I hope with the next hardware release Fender is fixing these issues.

To recap, the amp sounds are excellent, Fender FUSE is perfect (straight and easy). the overall look and feel is great but HW could be better.


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Post subject: Re: Auxillary Input has background noise
Posted: Fri Aug 03, 2012 11:31 am
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Hi MHSolar,

I definitely hear your concerns here. But I am still not quite clear as to the 'issue' that you are referring to. The amps will exhibit a moderate level of operating noise depending on which model is selected, effects applied, etc. What I am hoping to clarify here is your concern about the Aux input. So far, I am unable to reproduce what I believe you are describing.

If you would like, please feel free to give us a call, and I will be happy to discuss this further and offer any assistance we can with your amp. If you call in, please ask for Alan in the TSL. Thanks.

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Post subject: BACKGROUND NOISE: humm
Posted: Mon Aug 13, 2012 12:56 pm
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Location: Netherlands, Den Helder
I bought the amp Fender Mustang III 100 Watt 1x12 in June 2012. The FIRMWARE is uptodate, and fiddling with presets in FUSE didn't help losing the HUMM: I was in shock when i discovered this strange continues humm sound.

I always play with headphones but too my suprise this HUMM came through when i pulled the jack out.
Now i want to fix this very loud humm noise (master volume) that excists even WITHOUT anything plugged in.
It does help to drive down the volume (& gain) a bit, but the sound is utmost annoying!
Yes, not ALL presets have this, 'uch', but it's a real downer to me that this thing doesn't work properly...

Okey, i think i found a solution to FIX the HUMM: Yes to get rid of it completely!! Here's my stepthrough:
Open Fender Fuse
Put on your amp
Select a preset that HUMMIN (amp)
Press the 'Advanced amp' tab
Adjust the Depth down and up and all the way up again.
SAVE
OK??

All you have to do now is go through all presets that's HUMMIN and alter it like i explained and 'all's well' again.
I Have to point out though that this not works for all presets but it really has to do with tresh and depth and master volume and noise gate in advanced tab. Just turn both of these a notch and fiddle with it until the humm is gone.

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Post subject: Re: Auxillary Input has background noise
Posted: Tue Aug 14, 2012 9:18 am
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Hi Vinze,

Thanks for sharing your experience and input regarding this here. Please let us know if we can assist with anything as well.

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Post subject: Re: Auxillary Input has background noise
Posted: Fri Aug 17, 2012 9:04 pm
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There's also a sweet spot on the master volume between 3-4 that reduces the noise completely, in my experience.


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Post subject: Re: Auxillary Input has background noise
Posted: Mon Aug 20, 2012 12:03 pm
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Hi,
I have this problem too, and the solutions above did not help me (I own a Fender Mustang I). The problem is not the background noise created by the guitar pick-ups. I've tried the following while setting the Volume to 0 (the one between the Gain and Treble controls). There was nothing connected to the Input, so no hissing was coming out.

I made my experiments using a Samsung Galaxy S I phone, a cheap Philips MP3 player, my cheap HP notebook, my computer's integrated soundcard, and a discrete Creative Audigy 4 soundcard.

The first thing i tried was to use a 3.5mm to 3.5mm stereo extension cable between the amplifier Aux input and the outputs of all the devices (the Aux input seems to be Mono, because only the left (right?) channel was coming out of the amplifier).
Differences noticed:
- absolutely no hiss or background noise from the phone, MP3 player and from the laptop.
- a lot of hiss and background noise coming from the Audigy 4 soundcard and from the integrated one.

The next thing i tried was using a Stereo -> Mono converter. Because i couldn't buy one (they're hard to find where i live, apparently), I made one. Just to be sure there's no interference, I used shielded cables and metal jack plugs. I used the easy to follow tutorial found in the link at the end of the post to make one. Just like in the tutorial, i used 2 10K resistors (the only difference is that I used 3.5mm jacks).
Differences noticed:
- both channels are now coming out of the amplifier (The Beatles now sound good, yay!)
- like earlier, no hiss or background noise from the phone, MP3 player and from the laptop
- the same amount of hiss and background noise coming from the PC soundcards.

I'm assuming that there's an impedance problem involved. All the devices that worked well are designed to work with Headphones (probably 64-300 Ohm ones). The PC soundcards don't have a dedicated Headphone amplifier.

Will getting a dedicated Headphone amplifier for the PC do the trick? Or is there an easier, cheaper solution to be found? (I'm pretty good with the soldering iron)

Link to the tutorial I used: http://marcusmorris.blogspot.ro/2010/04/stereo-to-mono-converter-how-to-do-it.html


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Post subject: Re: Auxillary Input has background noise
Posted: Mon Aug 20, 2012 1:47 pm
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Hi iulianx

I'm sorry to hear that you are experiencing these challenges with the Aux input on your amp. The input is stereo and the output (when played through the amp) is summed and output through the single speaker. Each situation is a bit different in that electrical supply/quality of electric service and grounding can be an issue. The output level and signal-to-noise ratio of each connected device varies also. Ideally, you should be able to connect your smart phone for example and be able to output audio through the headphone jack to a line level source effectively.

One other area can have a big impact on the cleanliness of the sound you are hearing is the output hardware. You are saying here that you are using a "discrete" audio card. But likely the card itself is installed inside your computer case in a PCI slot. Is that correct? If so, grounding can be and often is a factor unless the audio lines are balanced at some point in the signal chain. I would suggest that if the Aux in is functioning correctly with a smart phone as the input and a pair of headphones as the output, then likely the amp is working correctly. From there, it may be a bit of trial and error to confirm where the noise issues are coming from. If you still believe that the amp itself is malfunctioning, please contact us and we will assist further. Thanks.

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Post subject: Re: Auxillary Input has background noise
Posted: Thu Jul 14, 2016 4:57 pm
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Hi,

I own a Mustang Mini and I definitely recognize the problem discussed here.

When connecting my iPhone to the aux-input everything works fine, but connecting my laptop and playing music from iTunes or YouTube causes a really violent white noise; and leaves the amp useless until I unplug the laptop again.

I've uploaded a audio-file to Soundcloud rather than trying to explain what this sounds like.

https://soundcloud.com/martinmarkvoll/f ... -aux-input


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