The magical function of carrying hifi and OTG in audio

Speaking of the OTG capabilities of Android, I don't know why it makes you think of NFC, which is as often overlooked as NFC, and I dare say that there are a lot of netizens who have never used these two functions, but a closer look at current trends will feel NFC, OTG functionality may be invisibly changing the details and habits of our use of portable devices.

In fact, now support NFC audio products are more and more, mainly used for fast Bluetooth pairing connection, so that the original has been idle mobile phone NFC has a use, peacetime contact with the Internet users will certainly gradually increase. And the OTG functionality of Android allows it to have the ability to support the keyboard, mouse, or USB disk, most of the key mouse designed for the use of wireless connection, the usual use of the tablet disk is not the chance to use, so OTG function seems to always be idle.

OTG features were brought to the public in Android 3.1 and, of course, only high-end equipment was available, but today OTG's phones are no longer confined to a small area.

USB OTG Standard logo

OTG full name is a USB on-the-go belongs to the USB2.0 Supplementary standard, no terminal equipment support, as long as the mobile device compatible with the standard can be popular to support OTG's mobile phone in connection with the mouse, U disk when the mobile phone will become a host, USB peripherals for the power supply, Support data entry from peripheral devices. When OTG was connected to the PC, it was a peripheral device that received power from the PC and was identified as a mobile storage device, which could say OTG made the phone more flexible and compatible with more peripherals.

Some people want to say what the OTG feature does for headphones enthusiasts, which seems to be designed for office users, but OTG's introduction also strengthens the audio aspect of Android devices. The ipod classic, which was popular among enthusiasts for the past two years, can output digital signals through 30pin interfaces, while IPC acts as a digital turntable when bundled with a portable DAC, which completely avoids the audio chips of the player itself, resulting in a purer sound quality.

Connect the portable DAC via the Apple 30pin interface

Therefore, there are also a number of portable DAC designed for iOS in the market, such as the popular Avery and AK10 and Sony's PHA-1, PHA-2 and proud of some products are perfect compatible with the Apple device DAC ear integration machine, compared to the size of the desktop system is relatively small, Easy to carry and bundle to use at ordinary times.

The popular Avery and AK10

Many Android phones do not have a digital output interface at all, and many phones do not have line out output, so if the Android phone wants to play bundled only through the 3.5mm headphone connector to connect the ear, this can enhance the thrust, but often degrade the sound quality through the phone's internal " The ear-drop, which is not very good, can be avoided by placing more distortion through the external ear.

Bayyadah Power launched a200p portable All-in-one Machine

The arrival of OTG is undoubtedly a solution for Android devices that allows many Android devices to be used as a digital turntable, and many of the portable DAC support iOS can be connected via microUSB interface to support OTG's phones and tablets.

I wonder if anyone has the idea that if OTG could get a mobile phone to connect to a variety of peripherals like a PC, wouldn't Android be able to access any DAC or sound card? As for this problem, I have tested, but unfortunately, because of the phone USB interface power supply capacity or equipment compatibility problems, and ultimately failed. So for now, with OTG just making Android devices compatible with the portable DAC developed for iOS, it's not possible to support more audio devices today.

Android phones can support external DAC via OTG

Many enthusiasts actually do not like to use mobile phone as a portable player, many times will be more favored portable hifi player, although these players can indeed be relatively good "step" for us to save a lot of trouble, but beside the mobile phone but also with a tablet computer, plus such a modest thing, This does not occupy the original space when we go out, the invisible has produced a kind of bondage.

Looks like the volume is not very small ...

I am more inclined to use mobile phone to bundle a portable DAC in the way out of the street, although it may be less than some high-end HiFi player, but enough to meet a lot of enthusiasts, while most Android phones have TF card expansion capabilities, to achieve 128G storage capacity is not difficult, on the other hand , mobile phones also provide a lot of online resources, if not lossless in the future full popularity of the advantage is quite obvious, as for the endurance, the simple use of music to play the words lasted a whole day is almost not a problem.

Portable DAC, the current choice is still a lot, and due to the problem of power supply, portable integrated machine must be built in battery, the endurance time is not too long, but the basic can be in 8 hours or so. Second, most of the thrust is also relatively large drive the common portable HiFi headphones are simply no pressure, and even a lot of can drive 300ω around the headphones.

Bundle small volume of portable decoding one function left a lot of space

It is a good portable HiFi scheme to use the mobile phone as a digital turntable when out of the street. If you bundle the small volume DAC such as Avery and AK10, it will not make the volume too bloated, but also bring a very thorough quality improvement, as for those large volume of HiFi players, the advantages are also some, Compared to these thin guys are sure to have better power design and output power, can push higher impedance headphones, but sometimes out of the street when I think there is no need to so hifi, often as long as the voice pure, listen to comfortable enough on the line.

(Responsible editor: Mengyishan)