In one sentence, describe what the following article is about: OS X Mavericks (10.9) has a lot of problems with sound, many of which were fixed in Yosemite (10.10). El Capitan (10.11) has fixed even more of these problems. Mac updates are free and are available from the Mac App Store. If there are any available system upgrades, they'll be listed here. Download El Capitan if it is listed in the Updates section. The download will likely take a while to complete. Follow the prompts to install the system update. It's a pretty straightforward process, and you won't lose any of your files or settings. Once the update has finished and you're back at your desktop, test your sound again to see if it is working.
Summary: Check to see if you are running the latest version. Open the Mac App Store. Click the "Updates" tab. Download the latest version of OS X. Install the system update. Test your sound again.

In one sentence, describe what the following article is about: Although chlamydia often presents few symptoms in its early stages, it’s important to be aware of any symptoms you may exhibit. Consult your doctor for a definitive diagnosis if you notice any signs of chlamydia, especially if you’ve engaged in unprotected sex.  Both men and women can contract chlamydia and repeat infection is common.  The early stage of a chlamydial infection often has little symptoms and even when signs are present, usually within 1 to 3 weeks after infection, they may be mild.  Common symptoms of chlamydia are: painful urination, lower abdominal pain, vaginal discharge in women, discharge from the penis in men, painful sexual intercourse, bleeding between periods and after sex in women, or testicular pain in men. If you experience any symptoms of chlamydia, including discharge from your genitals, or a partner has revealed they have chlamydia, make an appointment to see your doctor. She will run tests and confirm a diagnosis and develop the best treatment plan for you.  Tell your doctor about the symptoms you're experiencing, signs of chlamydia that you've noticed, as well as if you’ve had unprotected sex. If you’ve had chlamydia in the past and are experiencing a recurrence, contact your doctor to get a prescription. If your doctor suspects that you have chlamydia, she may order further medical examinations or tests. These simple screenings will help definitely diagnose the sexually transmitted disease and make it easier to develop a treatment plan.  If you're a female, your doctor may swab the discharge from your cervix or vagina and submit the sample to a laboratory for testing.  If you're a male, your doctor may insert a slim swab into the opening of your penis and swab the discharge from your urethra. She will then submit the sample to a laboratory for testing.  If you've engaged in oral or anal sex, your doctor takes a swab of your mouth or anus for chlamydia testing.  In some cases, a urine sample may detect a chlamydia infection.
Summary: Be aware of the symptoms and signs of chlamydia. Consult your doctor. Undergo medical examinations.

In one sentence, describe what the following article is about: "Settings" is the grey gear icon--it should be on your iPod's home screen.  You can disable or change your location settings from here. Location Services updates your iPod with your current location via GPS and cellphone tower, which is a significant drain on the battery. Disabling this background service will lengthen your battery's life considerably. Your location services should now be disabled!
Summary:
Open the Settings app. Find and tap the "Privacy" option. Tap the "Location Services" option at the top of this menu. Swipe the switch next to "Location Services" to the "Off" position. Close your Settings app.