The stratehy which I chosed is as an oral description from the present that reveals the past. In the video, the picture in the video is a subway station, but the subway station used to be a market. In the background sound, there is a combination of the sound of the previous market in the market and the sound of the current. In my video, I chose the central station for video production. In the 1800s, the central station was still called a central square. In that period, people used carriages as vehicles, so I chose the iconic voice of horseshoe. The whole video I chose to use the flashback method to shoot, put a complete video upside down with a feeling of returning from the present to the past, and then select the three distinctive sounds in the audio, the sound of the train wheels, broadcast The sound of The platform, as well as the whistling sound, then I merged the normal and reversed sounds of this audio to reflect the present and the past and add the voice of hooves to show the past. In the video, the whole journey starts from the elevator of the central station. After getting on the escalator, you can see the light board, then enter the hall of the central station, then go to the platform, then watch the train stop sign, and finally wait for the train to arrive and get on the train. In the production of painting, because my audio mixes 3 sounds in it, if I draw at the same time, it may not be very clear, and my painting may be very confusing, so I choose to draw the three sounds separately. combine it all together. Then the first question I need to think about is how to realize the relationship between the present and the past. I use regular arrows to indicate the hooves, then from top to bottom means from now to the past, and from left to right is from the past to the present. Thus, the present and the past are combined. Then, the above part indicates the present, the current sound is drawn with the fluctuation of the normally played audio, so the lower part indicates the past, the past sound is drawn with the fluctuation of the inverted audio, and finally I think the sound Is now clear and clean so I used blue to indicate, but the past sound is reversed, a little psychedelic, so I used yellow to indicate.

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