kierai
New Head-Fier
- Joined
- Jan 18, 2013
- Posts
- 21
- Likes
- 12
[size=12pt]Summary:[/size]
[size=12.0pt]Since I started using my iPod Touch 5 after I lost my iphone 4S in Sep 2012, I felt that the audio from iPhone 5 headphone out isn’t as clear as that of iPhone 4S. In one particular video clip, the audible difference is very obvious. However, using lightning to 30-pin to LOD and amp, it sounded ok. Using a simple audio recording freeware, this difference can be “seen” and heard.[/size]
[size=12.0pt]Report:[/size]
[size=12.0pt]Equipment / software used:[/size]
[size=12.0pt]Creative E-MU 0204[/size]
[size=12.0pt]Ipod Touch 5[/size]
[size=12.0pt]Lightning to 30-pin adapter[/size]
[size=12.0pt]LOD[/size]
[size=12.0pt]3.5mm to 2x 6.5mm Y-cable [/size]
[size=12.0pt]Audacity[/size]
[size=12.0pt]Video:[/size]
[size=12.0pt]http://www.mediafire.com/?413981xakazca16[/size]
[size=12.0pt](Kpop live performance. Area of interest: 0:50 to “la la la la”)[/size]
[size=12.0pt](Note: Content rights of this video belongs to KBS)[/size]
[size=12.0pt]What I hear:[/size]
[size=12.0pt]Using iPod Touch 5 headphone out, the “la la la” part suddenly become softer and muffled. It sounded similar on my mum’s iPhone 5 hp out.[/size]
[size=12.0pt]Using iPod Touch Line-Out via lightning and LOD, the “la la la” sounds coherent to the rest of the song.[/size]
[size=12.0pt]It sounded similar via hp out of my E-MU 0204, laptop (3 nos), iPhone 4S, iPod Touch 4, iPad 2.[/size]
[size=12.0pt]How I record:[/size]
[size=12.0pt]Line-out direct to EMU 0204 L/R Line in[/size]
[size=12.0pt]HP out to EMU 0204 L/R Line-in[/size]
[size=12.0pt]Both aren’t volume matched, I tried to record hp out such that on the “-12db” indicator on the E-MU 0204 is lit, but not the “clip” indicator.[/size]
[size=12.0pt]What I seen:[/size]
[size=12.0pt]What I hear and record (0:50 to “la la la la”)[/size]
[size=12.0pt]HP out - [/size][size=12.0pt]http://www.mediafire.com/?bbo4czo8eaajirv[/size]
[size=12.0pt]Line out - [/size][size=12.0pt]http://www.mediafire.com/?862ngnnaf3jrn7f[/size]
[size=12.0pt]Video converted to mp3 - [/size][size=12.0pt]http://www.mediafire.com/?2dlxrjopd5dbqbb[/size]
[size=12.0pt]Audacity Project file - [/size][size=12.0pt]http://www.mediafire.com/?pnoa1v5n10q9020[/size]
[size=12.0pt](Note: You do not need hundred/thousand-dollars equipment to hear the differences) [/size]
[size=12.0pt]Conclusion / Remarks:[/size]
[size=12.0pt]From what I recorded, there is seems to be real difference between using iPod Touch 5 hp out and line-out via lightning. So, the difference which I perceive between my iPhone 4S and iPod Touch 5 hp out should be real. [/size]
[size=12.0pt]What cannot be concluded:[/size]
[size=12.0pt]Is this difference is a “fault” on both on my iPod and my mum’s iphone ? Or does it occur for all iPhone 5 and iPod Touch 5 ?[/size]
[size=12.0pt]What causes this difference ?[/size][size=12.0pt] See update below.[/size]
[size=12.0pt]Does it affects other files (ALAC, mp3, mp4, mov, etc) ? [/size]
Update:
It turns out to be a software issue. The video sounded correct when played on 3rd party app instead of Apple default video app. All along i thought it was a hardware issue because it sounded correct when using line-out via lightning.
According to goodvibes, it looks like there's compression on the headphone out.
It may either be a bug or something incorporated into the app by Apple. So, for those who watch video on iPod Touch 5 or iPhone 5, please take note.
(1st original post: http://forums.hardwarezone.com.sg/headphones-earphones-portable-media-devices-314/ipod-touch-5-hp-out-vs-line-out-report-c-w-graph-audio-clips-4067883.html)
[size=12.0pt]Since I started using my iPod Touch 5 after I lost my iphone 4S in Sep 2012, I felt that the audio from iPhone 5 headphone out isn’t as clear as that of iPhone 4S. In one particular video clip, the audible difference is very obvious. However, using lightning to 30-pin to LOD and amp, it sounded ok. Using a simple audio recording freeware, this difference can be “seen” and heard.[/size]
[size=12.0pt]Report:[/size]
[size=12.0pt]Equipment / software used:[/size]
[size=12.0pt]Creative E-MU 0204[/size]
[size=12.0pt]Ipod Touch 5[/size]
[size=12.0pt]Lightning to 30-pin adapter[/size]
[size=12.0pt]LOD[/size]
[size=12.0pt]3.5mm to 2x 6.5mm Y-cable [/size]
[size=12.0pt]Audacity[/size]
[size=12.0pt]Video:[/size]
[size=12.0pt]http://www.mediafire.com/?413981xakazca16[/size]
[size=12.0pt](Kpop live performance. Area of interest: 0:50 to “la la la la”)[/size]
[size=12.0pt](Note: Content rights of this video belongs to KBS)[/size]
[size=12.0pt]What I hear:[/size]
[size=12.0pt]Using iPod Touch 5 headphone out, the “la la la” part suddenly become softer and muffled. It sounded similar on my mum’s iPhone 5 hp out.[/size]
[size=12.0pt]Using iPod Touch Line-Out via lightning and LOD, the “la la la” sounds coherent to the rest of the song.[/size]
[size=12.0pt]It sounded similar via hp out of my E-MU 0204, laptop (3 nos), iPhone 4S, iPod Touch 4, iPad 2.[/size]
[size=12.0pt]How I record:[/size]
[size=12.0pt]Line-out direct to EMU 0204 L/R Line in[/size]
[size=12.0pt]HP out to EMU 0204 L/R Line-in[/size]
[size=12.0pt]Both aren’t volume matched, I tried to record hp out such that on the “-12db” indicator on the E-MU 0204 is lit, but not the “clip” indicator.[/size]
[size=12.0pt]What I seen:[/size]
[size=12.0pt]What I hear and record (0:50 to “la la la la”)[/size]
[size=12.0pt]HP out - [/size][size=12.0pt]http://www.mediafire.com/?bbo4czo8eaajirv[/size]
[size=12.0pt]Line out - [/size][size=12.0pt]http://www.mediafire.com/?862ngnnaf3jrn7f[/size]
[size=12.0pt]Video converted to mp3 - [/size][size=12.0pt]http://www.mediafire.com/?2dlxrjopd5dbqbb[/size]
[size=12.0pt]Audacity Project file - [/size][size=12.0pt]http://www.mediafire.com/?pnoa1v5n10q9020[/size]
[size=12.0pt](Note: You do not need hundred/thousand-dollars equipment to hear the differences) [/size]
[size=12.0pt]Conclusion / Remarks:[/size]
[size=12.0pt]From what I recorded, there is seems to be real difference between using iPod Touch 5 hp out and line-out via lightning. So, the difference which I perceive between my iPhone 4S and iPod Touch 5 hp out should be real. [/size]
[size=12.0pt]What cannot be concluded:[/size]
[size=12.0pt]Is this difference is a “fault” on both on my iPod and my mum’s iphone ? Or does it occur for all iPhone 5 and iPod Touch 5 ?[/size]
[size=12.0pt]What causes this difference ?[/size][size=12.0pt] See update below.[/size]
[size=12.0pt]Does it affects other files (ALAC, mp3, mp4, mov, etc) ? [/size]
Update:
It turns out to be a software issue. The video sounded correct when played on 3rd party app instead of Apple default video app. All along i thought it was a hardware issue because it sounded correct when using line-out via lightning.
According to goodvibes, it looks like there's compression on the headphone out.
It may either be a bug or something incorporated into the app by Apple. So, for those who watch video on iPod Touch 5 or iPhone 5, please take note.
(1st original post: http://forums.hardwarezone.com.sg/headphones-earphones-portable-media-devices-314/ipod-touch-5-hp-out-vs-line-out-report-c-w-graph-audio-clips-4067883.html)