More control over audio has been a focus of many iOS jailbreak tweaks. Everything from volume amplifiers to sophisticated equalizers have made their way from Cydia to mobile devices. AudioOut is a relatively simple tweak that restores manual control of an automatic iOS function.
Every time headphones are plugged into the iPhone or iPad, sound output from the external speaker is shut off automatically. The sound is then routed into the headphones. iOS provides no option to change this default behavior. With AudioOut installed on a jailbroken device, it's possible to listen to sound on the speaker even when headphones are plugged in.
This option means that volume and track selection can be controlled with the headphone remote, even with music playing over the speaker. Some users with a busted headphone jack might find that AudioOut restores sound to the speaker. Others with headphones that are broken can still use them as a remote control when audio is playing out loud. Overall, the tweak provides a choice of when to switch output instead of letting iOS determine this by itself.
AudioOut is available on Cydia from the BigBoss repository for $0.99. Jailbreak iOS 7.1.x with Pangu to start customizing iOS. Check here for instructions on how to jailbreak iOS 7.0.x with evasi0n 7. You can also find out how to purchase and install Cydia tweaks with this guide.