@vanvugt I do have both cable types (with and without cable mic). In testing the Quiet Comfort 15s:
Bose CQ 15 w/ normal cable - The hiss is present with 0 dB headphone mic gain, but far more reduced than the Sony earbuds. It is almost unnoticeable. If I weren't trying to hear it, I'd miss it. Bose CQ 15 w/ mic cable - I cannot detect any hiss present with 0 db gain. @esokrarkose I'm sorry I misunderstood what you were saying about your experience with the hiss. I thought you were saying it only happened while playing a sound. I too experience the constant hiss with my earbuds. I don't doubt the hiss in normal headphones. The Bose CQs do produce the hiss with one cable type. It is barely noticeable and much more subdued than the earbuds. I'm not sure what Bose does if anything with the sound signal coming from the headphone jack. Maybe it's just reduced due to higher quality speakers than say my earbuds. As I understand it the noise cancellation is meant for external sounds, but like you said, maybe it plays a role in making the hiss less audible. The noise cancellation itself does produce a level of white noise. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360, Realtek ALC3246, Headphone audio hiss Status in alsa-driver package in Ubuntu: Confirmed Status in linux package in Ubuntu: Confirmed Status in pulseaudio package in Ubuntu: Confirmed Bug description: Pertaining to 16.04 on a dell XPS 13 9360 ii alsa-base 1.0.25+dfsg-0ubuntu5 Advanced Linux Sound Architecture Driver Version k4.4.0-57-generic. When headphones are plugged in, there is a clearly audible hiss (white noise). This is present as soon as the headphones are plugged in, whether 'headphones' or 'headset' are selected from the pop-up box. Using alsamixer to debug the issue reveals that it is related to "Headphone Mic Boost" - the default setting is: dB gain 0.00, 0.00. If this is changed to: 10.00, 10.00 (one notch up) the hiss disappears. 20.00, 20.00 cause a louder hiss and 30.00, 30.00 causes an even louder hiss with high frequency audio artifacts. When the headphones are removed and plugged back in the Headphone Mic Boost setting returns to dB gain 0 and the problem also returns. This (problem and workaround) has been reported in the wild: https://news.ycombinator.com/item?id=13050843 and https://www.reddit.com/r/Dell/comments/4j1zz4/headphones_have_static_noise_with_ubuntu_1604_on/ for example To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1654448/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
